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 concrete with strength grade of C90 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 450:493:1207:150:12:60:90. 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. The use 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 concrete with strength grade of C140 used for a profile steel-concrete composite structure. The concrete is characterized by being prepared from cement, fine aggregate, coarse aggregate, water, a water reducing agent, an antifoaming agent, siliceous dust, coal ash(kg / m<3>) in a mixing proportion of 485:660:1,173:117:13:0.7:65:100. A preparation method of the concrete comprises the following steps of: adding the fine aggregate and the water in an amount of which is a half based on the total weight of the used water into a forced mixer according to the weight proportion in turn; uniformly stirring for 1 to 2 minutes; adding the coarse aggregate into the mixer; uniformly stirring for 2 to 4 minutes; adding the cement, the siliceous dust and the coal ash into the mixer; uniformly stirring for 2 to 3 minutes; adding the water reducing agent, the antifoaming agent and the rest water into the mixer; uniformly stirring for 2 to 5 minutes; and discharging to obtain a concrete mixture. The concrete can obviously improve the adhesive property between profile steel and the concrete in a natural state, effectively exert respective capacity and cooperative work performance of both materials, greatly improve the carrying capacity and performance of members, and improve the durability, high volume stability and economy of the members.

Concrete used for a steel reinforced concrete composite structure and having the C230 strength grade is disclosed. A ratio of cement, fine aggregate, coarse aggregate, water, a water reducing agent, a defoaming agent, silica fume, fly ash, an activator, an expanding agent and a composite plastic retaining agent is 495:755:1284:100.5:20:1.4:98:122:10.5:51:0.60. The preparing method includes fully mixing the water reducing agent, the activator and the composite plastic retaining agent with the water to obtain a mixture, adding the fine aggregate and one third of the mixture into a stirrer in order, fully mixing, adding the coarse aggregate one third of the mixture in order, fully stirring, adding the cement, the expanding agent, the silica fume and the fly ash, fully stirring, adding the defoaming agent and the rest of the mixture, stirring and discharging. The concrete significantly improves adhesion performance between section steel and concrete under natural states, effectively exerts mechanical properties of the steel and the concrete and synergistic properties, greatly improves bearing capacity, using performance and durability of structural components, and has good high size stability and economical performance.

The invention discloses C150 (strength grade) concrete for a section steel-concrete combined structure, which is characterized by being prepared by mixing cement, fine aggregate, coarse aggregate, water, water reducer, defoaming agent, siliceous dust and flash ash in a mass / volume ratio of 485:701:1,145:104:15:1:65:100. The preparation method of the concrete comprises: adding the fine aggregate and half of the total amount of water into a forceful stirrer in turn according to a weight mixing ratio, uniformly stirring for 1 to 2 minutes, adding the coarse aggregate, uniformly stirring for 2 to4 minutes, adding the cement, the siliceous dust and the flash ash, uniformly stirring for 2 to 3 minutes, adding the water reducer, the defoaming agent and the rest of water, uniformly stirring for 2 to 5 minutes, and discharging to obtain a concrete mixture. The concrete has obviously improved section steel binding performance in a natural state and can effectively play respective capability and coordinate operation performance with the section steel, thereby improving the bearing capacity and performance of a member considerably and improving the durability, high-volume stability and economy of the member.

The invention discloses a C200 strength-grade concrete for a formed steel concrete composite structure, which is composed of 473 parts of cement, 846 parts of fine aggregate, 1054 parts of coarse aggregate, 98.8 parts of water, 19.6 parts of concrete superplasticizer, 1.1 parts of defoaming agent, 84 parts of silicon powder, 123 parts of expanding agent, 7.2 parts of activator and 40 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 concrete for the steel reinforced concrete composite structure C250 strength grade. The matching ratio of cement to fine aggregate to coarse aggregate to water to water reducing agent to antifoaming agent to silica powder to coal ash to exciting agent to expanding agent to composite plastic retaining agent is 504:769:1,308:102:21:1.5:100:125:11:52:0.65. A preparing method includes the steps that the water reducing agent, the exciting agent and the composite plastic retaining agent are evenly stirred into water to obtain a mixture, and the fine aggregate and 1 / 3 of the total mixture are sequentially added into a stirring machine according to the weight ratio and stirred to be even; the coarse aggregate and 1 / 3 of the total mixture are added and stirred to be even; the cement, the expanding agent, the silica powder and the coal ash are added and stirred to be even; the antifoaming agent and the residual mixture are added, and the mixture is stirred and discharged. By means of the concrete, the bonding performance between structural steel and the concrete can be remarkably improved under the natural state, the mechanical performance and the cooperative work performance of the steel and the concrete are effectively developed, the carrying capacity, the use performance and the durability of a structural element are greatly improved, and the concrete has the good high volume stability and the good economy.

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.