95u grade microsilica factory – Silica Fume for Sale …
Microsilica 95 grade is dry silica fume available in two main … Silica Fume Refractory; Silica Fume Oil Well; Factory Equipment; … Silica fume concrete seminar …
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
silica fume concrete Factory China – Low Price – WINITOOR
Find the silica fume concrete here at silicafume-China.com. Our products are competitive in high electrical resistivity, low permeability, high temperature, etc. Welcome to enjoy the low price, excellent service and fast delivery with our factory.
Silica Fume Concrete – Silica Fume for Sale, Microsilica …
Silica Fume Concrete is widely used in concrete and fiber cement industries. In addition to its pozzolanic properties its is also a very good filler due to its particle size.
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of our microsilica for concrete.
.jpg)
microsilica for castable factory – Silica Fume for Sale …
China High Quality Densified Silica Fume for Concrete, … Factory price , 2. Good Quality, 3 … we highly recommend to use SioxX in microsilica containing castables …
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
concrete mixer, or part of a factory-blended cement. … ever) used in the UK. Silica fume concrete is normally designed for high durability or strength
Effect of Silica Fume on Concrete Properties and Advantages …
Effect of Silica Fume on Concrete Properties and … provement in durability will also improve the ability of silica fume concrete in … corporated into factory …
.jpg)
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
Newreach High quality silica fume supplier.
Project content: the box section prestressed concrete with silica fume of a 1365 meter continuous beam bridge and a 510 meter underground roadway. ALL.
MICROSILICA SILICA FUME SUPPLIER EXPORTER INDIA CONCRETE
MICROSILICA, SILICA FUME INDIA – ORISIL. Microsilica, Silica Fume Suppliers – Oriental Trexim Private Limited is a leading Exporter, Supplier, Manufacturer of Micro-White Microsilica, Microsilica, Silica Fume, Fumed Silica, Metakaolin, Microwhite Silica Fume and other material like Super Plasticizers in India.
.jpg)
Micro silica fume Manufacturers & Suppliers, China micro …
micro silica fume manufacturer/supplier, China micro silica fume manufacturer & factory list, find qualified Chinese micro silica fume manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in-China.com.
Silica Fume For Concrete, Silica Fume For Concrete … – Alibaba
Silica Fume For Concrete, Wholesale Various High Quality Silica Fume For Concrete Products from Global Silica Fume For Concrete Suppliers and Silica Fume For Concrete Factory,Importer,Exporter at Alibaba.com.
Microsilica, Microsilica Suppliers and Manufacturers at …
Microsilica, Wholesale Various High Quality Microsilica Products from Global Microsilica Suppliers and Microsilica Factory,Importer,Exporter at Alibaba.com.
Home – Low Price Microsilica Fume Supplier in China-Henan …
Low price silica fume, microsilica fume supplier in China, mainly supply undensified/densified 85% silica fume, 92% silica fume, 94% silica fume, 96% silica fume,
China Silica Fume, Silica Fume Manufacturers, Suppliers …
China Silica Fume manufacturers – Select 2018 high quality Silica Fume products in best price from certified Chinese Concrete manufacturers, China Cement suppliers, wholesalers and factory on Made-in-China.com
Fly Ash, Slag, Silica Fume, and Natural Pozzolans, Chapter 3
Fly Ash, Slag, Silica Fume, and Natural Pozzolans Fly ash, ground granulated blast-furnace slag, … and silica fume were used in concrete individually. Today,
How Does Silica Fume Work in Concrete?
When silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary chemical reactions produce two chemical compounds: Calcium Silicate Hydrate (CSH), which is the strength producing crystallization, and Calcium Hydroxide (CH), a by-product also called …
Micro Silica Fume Supplier India – Home | Facebook
Micro Silica Fume Supplier India, Vashi, Navi mumbai : … White Microsilica is a dry powder microsilica admixture for portland cement concrete and mortars.
Red Industrial Products – Silica fume concrete addmix
Red Industrial Products sells high quality Silica Fume in bulk for the Concrete Industry, the Oil and Gas Industry as well for the Mineral Processing Industry
Newreach High quality silica fume supplier.
Project content: the box section prestressed concrete with silica fume of a 1365 meter continuous beam bridge and a 510 meter underground roadway. ALL.
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of …
.jpg)
silica fume concrete Factory China – Low Price – WINITOOR
Find the silica fume concrete here at silicafume-China.com. Our products are competitive in high electrical resistivity, low permeability, high temperature, etc …
.jpg)
Condensed silica fume in concrete factory – Low Price …
Low price silica fume, microsilica fume supplier in China, mainly supply undensified/densified 85% silica fume, 92% silica fume, 94% silica fume, 96% silica fume,
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
IN CONCRETE SOCIETY REPORT 74, CEMENTITIOUS … mixing together cementitious components either at the concrete mixer or in the cement factory … Silica fume concrete …
Silica fume Manufacturers & Suppliers, China silica fume …
silica fume manufacturer/supplier, China silica fume manufacturer & factory list, find qualified Chinese silica fume manufacturers, suppliers, factories, exporters …
Quality Concrete Silica Fume & Refractory Silica Fume …
Please input your companyname! is best Concrete Silica Fume, Refractory Silica Fume and Densified Silica Fume supplier, we has good quality products & service from China.
Silica Fume Factory, Silica Fume Factory Suppliers … – Alibaba
Alibaba.com offers 676 silica fume factory products. About 32% of these are silica, 17% are oxide, and 4% are leather auxiliary agents. A wide variety of silica fume …
Oriental Trexim – MICROSILICA, SILICA FUME, Metakaolin …
MICROSILICA, SILICA FUME, Metakaolin, superplasticizer SUPPLIER EXPORTER INDIA – CONCRETE & REFRACTORY
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
Home – Silica Fume for Sale, Microsilica Supplier in China
Low price silica fume, … Silica Fume Refractory; Silica Fume Oil Well; Factory … source of high-performance Silica Fume products for concrete and refractory …
.jpg)
Densified silica fume factory in China – Silica Fume for Sale …
Low price silica fume, microsilica fume supplier in China, mainly supply undensified/densified 85% silica fume, 92% silica fume, 94% silica fume, 96% silica fume,
Home – Low Price Microsilica Fume Supplier in China-Henan …
Low price silica fume, … Civil engineering concrete micro silica loose powder factory Micro silica loose powder parameter: Silicon Dioxide (SiO2): …
How Does Silica Fume Work in Concrete?
When silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary …
Microsilica, Microsilica Suppliers and Manufacturers at …
Microsilica, Wholesale Various High Quality Microsilica Products from Global Microsilica Suppliers and Microsilica Factory,Importer,Exporter at Alibaba.com.
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
.jpg)
Effect of Silica Fume on Concrete Properties and … – IJSER
Abstract— This research describes the importance of the effect of silica fume on concrete … or incorporated into a factory … ability of silica fume concrete in …
densified silica fume factory – Silica Fume for Sale …
densified silica fume factory – Silica Fume for Sale … China Densified Micro Silica for Concrete, Find details about China Micro Silica, Silica Fume from …
micro concrete mix design factory – Silica Fume for Sale …
Silica fume, microsilica fume supplier in China, mainly supply undensified/densified 85% silica fume, 92% silica fume, 94% silica fume, 96% silica fume,
Silica Fume manufacturers & suppliers – made-in-china.com
China Silica Fume manufacturers – Select 2018 high quality Silica Fume products in best price from certified Chinese Concrete manufacturers, China Cement suppliers …
Newreach High quality silica fume supplier.
Project content: the box section prestressed concrete with silica fume of a 1365 meter continuous beam bridge and a 510 meter underground roadway. ALL.
Home – Low Price Microsilica Fume Supplier in China-Henan …
Low price silica fume, … Civil engineering concrete micro silica loose powder factory Micro silica loose powder parameter: Silicon Dioxide (SiO2): …
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
IN CONCRETE SOCIETY REPORT 74, CEMENTITIOUS … mixing together cementitious components either at the concrete mixer or in the cement factory … Silica fume concrete …
densified silica fume factory – Silica Fume for Sale …
densified silica fume factory – Silica Fume for Sale … China Densified Micro Silica for Concrete, Find details about China Micro Silica, Silica Fume from …
About Us – Low Price Microsilica Fume Supplier in China-Henan …
Our Factory. Henan Superior Abrasives Import and Export Co., Ltd is one of the largest Silica Fume Suppliers in China, and also the premium source of high-performance …
China Silica Fume, Silica Fume Manufacturers, Suppliers …
China Silica Fume manufacturers – Select 2018 high quality Silica Fume products in best price from certified Chinese Concrete manufacturers, China Cement suppliers …
Quality Concrete Silica Fume & Refractory Silica Fume …
Please input your companyname! is best Concrete Silica Fume, Refractory Silica Fume and Densified Silica Fume supplier, we has good quality products & service from China.
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
How Does Silica Fume Work in Concrete?
When silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary …
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
Effect of Silica Fume on Concrete Properties and Advantages …
Effect of Silica Fume on … or incorporated into a factory … provement in durability will also improve the ability of silica fume concrete in protecting …
silica fume concrete factory – Silica Fume for Sale …
China Silica Fume for Concrete Factory – Low Price … WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, …
Silica fume Manufacturers & Suppliers, China silica fume …
silica fume manufacturer/supplier, China silica fume manufacturer & factory list, find qualified Chinese silica fume manufacturers, suppliers, factories, exporters …
Oriental Trexim – MICROSILICA, SILICA FUME, Metakaolin …
MICROSILICA, SILICA FUME, Metakaolin, superplasticizer SUPPLIER EXPORTER INDIA – CONCRETE & REFRACTORY
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of …
Silica Fume Wholesale, Silica Suppliers – Alibaba
Silica Fume, Wholesale Various High Quality Silica Fume Products from Global Silica Fume Suppliers and Silica Fume Factory,Importer,Exporter at Alibaba.com.
Home – Silica Fume for Sale, Microsilica Supplier in China
Low price silica fume, … Silica Fume Refractory; Silica Fume Oil Well; Factory … source of high-performance Silica Fume products for concrete and refractory …
Factory Price Silica Fume / Microsilica – Alibaba
Factory Price Silica Fume / Microsilica , Find Complete Details about Factory Price Silica Fume / Microsilica,Silica Fume,Factory Price Silica Fume,Factory Price …
Silica fume concrete properties factory – Silica Fume for …
Low price silica fume, microsilica fume supplier in China, mainly supply undensified/densified 85% silica fume, 92% silica fume, 94% silica fume, 96% silica fume,
silica fume concrete Factory China – Low Price – WINITOOR
Find the silica fume concrete here at silicafume-China.com. Our products are competitive in high electrical resistivity, low permeability, high temperature, etc …
Silica fume concrete properties factory – Silica Fume for …
Silica fume concrete basic physical and mechanical properties: 1. The compatibility of new mixed concrete The surface area of the silica fume is very large, and the …
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of …
Newreach High quality silica fume supplier.
Project content: the box section prestressed concrete with silica fume of a 1365 meter continuous beam bridge and a 510 meter underground roadway. ALL.
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
IN CONCRETE SOCIETY REPORT 74, CEMENTITIOUS … mixing together cementitious components either at the concrete mixer or in the cement factory … Silica fume concrete …
silica fume concrete factory – Silica Fume for Sale …
China Silica Fume for Concrete Factory – Low Price … WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, …
Silica Fume Factory, Silica Fume Factory Suppliers and …
Alibaba.com offers 834 silica fume factory products. About 29% of these are silica, 20% are oxide, and 10% are electronics chemicals. A wide variety of silica fume …
Quality Concrete Silica Fume & Refractory Silica Fume …
Please input your companyname! is best Concrete Silica Fume, Refractory Silica Fume and Densified Silica Fume supplier, we has good quality products & service from China.
What is microsilica? – Silica Fume for Sale, Microsilica …
Application of microsilica fume in concrete. The micro silica fume powder can be well filled in the cement particle space and make … Silica fumes in concrete factory;
Silica fume Manufacturers & Suppliers, China silica fume …
silica fume manufacturer/supplier, China silica fume manufacturer & factory list, find qualified Chinese silica fume manufacturers, suppliers, factories, exporters …
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
densified silica fume factory – Silica Fume for Sale …
Densified silica fume factory in China – Silica Fume for Sale … Densified silica fume in slurry hardened paste has obvious cluster effect, part of microsilica …
How Does Silica Fume Work in Concrete?
When silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary …
Oriental Trexim – MICROSILICA, SILICA FUME, Metakaolin …
MICROSILICA, SILICA FUME, Metakaolin, superplasticizer SUPPLIER EXPORTER INDIA – CONCRETE & REFRACTORY
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
Silica Fume Wholesale, Silica Suppliers – Alibaba
Silica Fume, Wholesale Various High Quality Silica Fume Products from Global Silica Fume Suppliers and Silica Fume Factory,Importer,Exporter at Alibaba.com.
Micro silica fume Manufacturers & Suppliers, China micro …
micro silica fume manufacturer/supplier, China micro silica fume manufacturer & factory list, find qualified Chinese micro silica fume manufacturers, suppliers …
Effect of Silica Fume on Concrete Properties and Advantages …
Effect of Silica Fume on … or incorporated into a factory … provement in durability will also improve the ability of silica fume concrete in protecting …
Factory Directly Supply Dry Mixed Mortar Used Densifeid …
china silica fume concrete china factory directly supply pneumatically applied offer high quality accelerant calcium formate for dry mixed mortar feed.
SCMs in Concrete: Silica Fume – Precast concrete
Silica fume basics. Silica fume is a byproduct from the production of silicon alloys in an electric arc furnace. The materials are heated to more than 3,600 degrees …
Use of silica fume in concrete – Waste Materials Used in …
USE OF SILICA FUME IN CONCRETE Satish Chandra and Leif Berntsson … In a Swedish precast concrete factory that produces … In the silica fume concrete, …
silica fume concrete factory – Silica Fume for Sale …
China Silica Fume for Concrete Factory – Low Price … WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, …
.jpg)
Silica fume concrete properties factory – Silica Fume for …
Silica fume concrete basic physical and mechanical properties: 1. The compatibility of new mixed concrete The surface area of the silica fume is very large, and the …
microsilica in concrete factory – Silica Fume for Sale …
Application of microsilica fume in concrete. … Densified silica fume factory in China; Microsilica for castable with low price; Silica Fume in High-strength …
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of …
Disadvantages of silica fume in concrete – Silica Fume for …
Silica fume can be used either as a densified microsilica or undensified micro silica fume powder, … China cost of silica fume; Silica fume concrete properties factory;
Silica Fume Factory, Silica Fume Factory Suppliers … – Alibaba
Alibaba.com offers 834 silica fume factory products. About 29% of these are silica, 20% are oxide, and 10% are electronics chemicals. A wide variety of silica fume …
Quality Concrete Silica Fume & Refractory Silica Fume …
Please input your companyname! is best Concrete Silica Fume, Refractory Silica Fume and Densified Silica Fume supplier, we has good quality products & service from China.
How Does Silica Fume Work in Concrete?
When silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary …
Newreach High quality silica fume supplier.
Project content: the box section prestressed concrete with silica fume of a 1365 meter continuous beam bridge and a 510 meter underground roadway. ALL.
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
IN CONCRETE SOCIETY REPORT 74, CEMENTITIOUS … mixing together cementitious components either at the concrete mixer or in the cement factory … Silica fume concrete …
China effect of silica fume in concrete – Low Price …
Silica fume can be used either as a densified or undensified powder, a slurry, as combination at the concrete mixer, or part of a factory-blended cement.
Silica fume Manufacturers & Suppliers, China silica fume …
silica fume manufacturer/supplier, China silica fume manufacturer & factory list, find qualified Chinese silica fume manufacturers, suppliers, factories, exporters …
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
Home – Low Price Microsilica Fume Supplier in China-Henan …
Undensified Silica Fume (320-360kg/m³) Densified Silica Fume … and also the premium source of high-performance Silica Fume products for concrete and refractory …
Effect of Silica Fume on Concrete Properties and … – IJSER
Abstract— This research describes the importance of the effect of silica fume on concrete … or incorporated into a factory … ability of silica fume concrete in …
silica fume concrete Factory China – Low Price – WINITOOR
Find the silica fume concrete here at silicafume-China.com. Our products are competitive in high electrical resistivity, low permeability, high temperature, etc …
China Silica Fume, Silica Fume Manufacturers, Suppliers …
China Silica Fume manufacturers – Select 2018 high quality Silica Fume products in best price from certified Chinese Concrete manufacturers, China Cement suppliers …
Factory price silica fume / microsilica, View Silica fume …
Factory price silica fume / microsilica,US $ 100 – 160 / Ton, Sichuan, China (Mainland), EBS, EBS-A-002.Source from Chengdu Donglanxing Science&Technology Development …
Microsilica, Microsilica Suppliers and Manufacturers at …
Microsilica, Wholesale Various High Quality Microsilica Products from Global Microsilica Suppliers and Microsilica Factory,Importer,Exporter at Alibaba.com.
Silica fume – Wikipedia
Silica fume, also known as … in particular high-performance concrete. Effects of silica fume on different properties of fresh and hardened concrete include …
China Silica Fume for Concrete Factory – Low Price …
WINITOOR is a professional manufacturer of silica fume for concrete in China. High electrical resistivity, low permeability, high temperature are main advantages of …
silica fume concrete Factory China – Low Price – WINITOOR
Find the silica fume concrete here at silicafume-China.com. Our products are competitive in high electrical resistivity, low permeability, high temperature, etc …
Silica fume Manufacturers & Suppliers, China silica fume …
silica fume manufacturer/supplier, China silica fume manufacturer & factory list, find qualified Chinese silica fume manufacturers, suppliers, factories, exporters …
THE EFFECT OF SILICA FUME ON THE PROPERTIES OF CONCRETE AS …
IN CONCRETE SOCIETY REPORT 74, CEMENTITIOUS … mixing together cementitious components either at the concrete mixer or in the cement factory … Silica fume concrete …
Silica Fume Factory, Silica Fume Factory Suppliers and …
Alibaba.com offers 876 silica fume factory products. About 29% of these are silica, 19% are oxide, and 7% are non-explosive demolition agents. A wide variety of …
Disadvantages of silica fume in concrete – Silica Fume for …
Silica fume can be used either as a densified microsilica or undensified micro silica … as a combination at the concrete mixer, or part of a factory-blended cement.
Welcom to Shanghai Silicon Fume Co.ltd
Our factory ———— We, ShangHai Silicon Fume Co., Ltd is a professional and leading producer and supplier of silica fume(Microsilica) in China.
Microsilica, Microsilica Suppliers and Manufacturers at …
Microsilica, Wholesale Various High Quality Microsilica Products from Global Microsilica Suppliers and Microsilica Factory,Importer,Exporter at Alibaba.com.
China Silica Fume, Silica Fume Manufacturers, Suppliers …
China Silica Fume manufacturers – Select 2018 high quality Silica Fume products in best price from certified Chinese Concrete manufacturers, China Cement suppliers …
Microsilica in Concrete PPT – Silica Fume for Sale …
Silica Fume Refractory; Silica Fume Oil Well; Factory … Depending on the dosage of micro silica fume, the fresh concrete … Ltd is one of the largest Silica Fume …
Factory price silica fume / microsilica, View Silica fume …
Factory price silica fume / microsilica,US $ 100 – 160 / Ton, Sichuan, China (Mainland), EBS, EBS-A-002.Source from Chengdu Donglanxing Science&Technology Development …
Quality Concrete Silica Fume & Refractory Silica Fume …
Please input your companyname! is best Concrete Silica Fume, Refractory Silica Fume and Densified Silica Fume supplier, we has good quality products & service from China.
Oriental Trexim – MICROSILICA, SILICA FUME, Metakaolin …
MICROSILICA, SILICA FUME, Metakaolin, superplasticizer SUPPLIER EXPORTER INDIA – CONCRETE & REFRACTORY
Effect of Silica Fume on Concrete Properties and Advantages …
Abstract— This research describes the importance of the effect of silica fume on concrete … of silica fume concrete in … factory -produced composite …
Silica fume,Microsilica – Chengdu Donglanxing Science …
Chengdu Donglanxing Science&Technology Development Co., Ltd., Experts in Manufacturing and Exporting Silica fume,Microsilica and 120 more Products. A Verified CN Gold …
Investigations on Microsilica (Silica Fume) As Partial Cement …
Investigations on Microsilica (Silica Fume) As Partial Cement Replacement in Concrete . Faseyemi Victor Ajileye . cost of building materials, particularly cement is …
Fly Ash, Slag, Silica Fume, and Natural Pozzolans, Chapter 3
Fly Ash, Slag, Silica Fume, and Natural Pozzolans Fly ash, ground granulated blast-furnace slag, … and silica fume were used in concrete individually. Today,
Silica Fume – Micro Silica Suppliers, Traders & Manufacturers
Find here Silica Fume manufacturers, suppliers & exporters in India. Get contact details & address of companies manufacturing and supplying Silica Fume, Micro Silica …
Low price Microsilica 85 grade – Low Price Microsilica Fume …
Silica fume is a very fine powder – the particles are approximately 1/100 the diameter of portland cement grains. When used to produce high-performance concrete …