34results about How to "High strength and high workability" patented technology

The invention discloses a concrete with strength grade of C70 for composite structure of steel reinforced concrete. Mixed proportion of the concrete is that cement: coarse: aggregate: fine aggregate: water: effective water reducer: silica fume: fly ash is 400:576:1224:148:8:30:120. Component unit is Kg / m3. The concrete is in good mechanical properties (comprising strength, plastic and bond behavior between section steel and concrete), excellent in working performance, good in durability and relatively lower in cost, and is suitable for the composite structure of steel reinforced concrete. Theuse of the concrete reduces construction procedures, saves steel, improves construction efficiency and has remarkable economic benefit.

The invention discloses a C190 strength-grade concrete for a formed steel concrete composite structure, which is composed of 466 parts of cement, 842 parts of fine aggregate, 1065 parts of coarse aggregate, 97 parts of water, 19 parts of concrete superplasticizer, 1.1 parts of defoaming agent, 75 parts of silicon powder, 119 parts of expanding agent, 7 parts of activator and 38 parts of expanding agent. The preparation method comprises the following steps: blending the concrete superplasticizer and activator into weighed water to obtain a mixture, sequentially adding the fine aggregate and 1 / 3 of the mixture into a stirrer according to parts by weight, and stirring; adding the coarse aggregate and 1 / 3 of the mixture, and stirring; adding the cement, expanding agent, silicon powder and fly ash, and stirring; and adding the defoaming agent and the rest of mixture, stirring and discharging. The concrete can obviously improve the bonding property between the formed steel and the concrete in a natural state, effectively displays the respective mechanical properties and the synergic working performance of the steel and concrete, greatly enhances the loading capacity, service performance and durability of the structural member, and has high volume stability and economical efficiency.

The invention discloses a concrete for a profiled steel concrete composite structure with C110 in strength grade and is characterized in that the concrete mix ratio to fine aggregate to coarse aggregate to water to water reducer to siliceous dust to coal ash (kg / m<3>) is 450:496:1276:138:9:60:90. A preparation method of the concrete comprises the following steps: adding the fine aggregate and thewater to a forced mixer in proportion by weight, wherein the water accounts for 50% of the total water consumption; evenly stirring the mixture for 1-2min, adding the coarse aggregate for evenly stirring for 2-4min, adding the concrete, the siliceous dust and the coal ash for stirring for 2-3min, and adding the water reducer and the rest of the water; and finally evenly stirring the mixture for 2-3min and discharging to obtain the concrete mixture. The concrete can obviously improve the adhesive property between the profiled steel and the concrete under the natural condition and effectively exert individual capacity and cooperative work performance of the two materials, thereby greatly improving bearing capacity and performance of construction members and enhancing durability, high-volumestability and economy thereof.

The invention discloses a C170 strength-grade concrete for a formed steel concrete composite structure, which is composed of 465 parts of cement, 816 parts of fine aggregate, 1094 parts of coarse aggregate, 96 parts of water, 16 parts of concrete superplasticizer, 1 part of defoaming agent, 70 parts of silicon powder, 115 parts of fly ash and 6 parts of activator. The preparation method comprises the following steps: blending the concrete superplasticizer and activator into weighed water to obtain a mixture, sequentially adding the fine aggregate and 1 / 3 of the mixture into a stirrer according to parts by weight, and stirring; adding the coarse aggregate and 1 / 3 of the mixture, and stirring; adding the cement, silicon powder and fly ash, and stirring; and adding the defoaming agent and the rest of mixture, stirring and discharging. The concrete can obviously improve the bonding property between the formed steel and the concrete in a natural state, effectively displays the respective mechanical properties and the synergic working performance of the steel and concrete, greatly enhances the loading capacity, service performance and durability of the structural member, and has favorable working performance and economical efficiency.