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High compressive strength ratio concrete and preparation method thereof

A fold-to-compression ratio and concrete technology, which is applied to high fold-to-compression ratio concrete and its preparation, high fold-to-compression ratio concrete material and its preparation field, can solve the problem of limited improvement of flexural strength, increased engineering cost, poor construction performance, etc. problems, to achieve the effect of improving the compactness and strength, reducing the water-binder ratio, and improving the state

Inactive Publication Date: 2014-01-15
JIANGSU MINGHE GRP
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Problems solved by technology

At present, there are still many defects in the preparation technology of high compressive ratio concrete materials. Most high compressive ratio concretes have problems of poor durability, high cost and poor construction performance.
For the published patented technology, there are two main methods to improve the concrete flexural strength: (1) Increase the concrete flexural strength by adding polymer powder, emulsion and other adhesives. Although this method can significantly improve the concrete Flexural strength, but most polymer adhesives are expensive, greatly increasing engineering costs
In addition, some polymer adhesives have an air-entraining effect, which will lead to a decrease in the compressive strength of the concrete material and poor durability
(2) Improve the flexural strength of concrete by adding an anti-flexural agent with particle dispersion effect, but the results show that this method has a limited effect on improving the flexural strength

Method used

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  • High compressive strength ratio concrete and preparation method thereof
  • High compressive strength ratio concrete and preparation method thereof
  • High compressive strength ratio concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: A kind of high compression ratio concrete and its preparation method

[0024] The first step: Weigh the raw materials according to the following mixing ratio, cement: mineral powder: fly ash: porous basalt: blast furnace slag: water: admixture=7.0kg:2.0kg:1.5kg:20.8kg:13.6kg:3.4kg: 250g; ordinary Portland cement with a cement grade of 42.5; the porous basalt is continuously graded porous basalt with a particle size of 5-20 mm; the admixture is an aliphatic water reducer; the water-quenched blast furnace slag The fineness modulus is 2.3~3.0. The porosity of the porous basalt is 35%. The saturated surface dry water absorption of the water-quenched blast furnace slag is 9%.

[0025] Step 2: Add porous basalt, water-quenched blast furnace slag and water into the mixer to fully soak the coarse and fine aggregates, and stir for 1 minute;

[0026] Step 3: Add cement, slag powder, fly ash and admixtures into the mixer, fully stir until uniform;

[0027] Step 4...

Embodiment 2

[0031] Embodiment 2: A kind of high compression ratio concrete and its preparation method

[0032] The first step: Weigh the raw materials according to the following mixing ratio, cement: mineral powder: fly ash: porous basalt: blast furnace slag: water: admixture=6.0kg:1.5kg:1.5kg:21.0kg:15.2kg:3.4kg: 235g;

[0033] The cement is ordinary Portland cement with a strength grade of 42.5R; the porous basalt is continuously graded porous basalt with a particle size of 5-20 mm; the admixture is an aliphatic water reducer; the water The fineness modulus of quenched blast furnace slag is 2.4-2.9. The porosity of the porous basalt is 39%. The saturated surface dry water absorption of the water-quenched blast furnace slag is 10%.

[0034] Step 2: Add porous basalt, water-quenched blast furnace slag and water into the mixer to fully soak the coarse and fine aggregates, and stir for 1 minute;

[0035] Step 3: Add cement, slag powder, fly ash and admixtures into the mixer, fully stir ...

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Abstract

The invention discloses high compressive strength ratio concrete and a preparation method thereof. The concrete comprises the following constituents: cement, mineral admixtures, coarse aggregate, fine aggregate, water and an additive with the weight ratio of (12-16):(6-9):(37-46):(25-33):(6-7):(0.4-0.8). By replacing frequently used coarse and fine aggregate through porous basalt and water-quenching blast furnace slags and improving the preparation method, the high compressive strength ratio concrete with high bending strength, good durability and low cost is prepared, the bending strength of the concrete can reach more than 7.5 MPa, the compressive strength ratio can reach 1 / 5 to 1 / 7, the problem that the existing high compressive strength ratio concrete has low bending strength, high cost and poor durability is solved, and the concrete can be widely applied to projects, such as large-span bridges, roads, overload pavements and the like, which have higher requirements on bending strength.

Description

technical field [0001] The invention relates to a high-folding-ratio concrete and a preparation method thereof, in particular to a high-folding-ratio concrete material used for roads and bridges and a preparation method thereof, and belongs to the technical field of concrete material preparation. Background technique [0002] As a brittle material, ordinary concrete has the disadvantages of high brittleness and insufficient toughness, which greatly limits its application range. At present, my country's high-grade roads and bridges have a large traffic flow and have high requirements for the quality of concrete. It not only requires high compressive strength and durability, but also requires concrete to have high flexural strength. At the same time, the national standard also regards the flexural strength of concrete as the key to controlling the quality of high-grade cement concrete pavement, and it needs to reach 5.0MPa or more in 28 days. The 28-day flexural strength is r...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/30
CPCY02W30/91
Inventor 臧军耿长圣马树泉
Owner JIANGSU MINGHE GRP
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