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Flexible early strength concrete and preparation method thereof

A concrete and flexible technology, applied in the field of flexible early-strength concrete and its preparation, can solve the problems of increased wear, rapid decay of the anti-slip performance of cement concrete pavement, and difficulty in large-scale application of concrete technology.

Inactive Publication Date: 2017-07-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous construction of high-grade highways in my country, the grade of highways is also constantly improving, and the defects in the performance of cement concrete pavements are gradually emerging, which is not conducive to the high-speed, safe and comfortable driving of vehicles, specifically reflected in: (1) road surface Poor flatness and poor driving comfort
Cement concrete has a large modulus, strong shrinkage, and poor flatness. When a car runs on it, the vibration amplitude is large, which affects driving comfort; (2) The anti-skid performance of cement concrete pavement decays quickly, and the driving safety is poor
When the cement concrete pavement was just opened to traffic, technical measures such as grooves and notches were adopted to improve the anti-skid performance of its surface. As time went by, the wear and tear increased and the anti-skid ability quickly decreased, which brought a negative impact on the vehicle's high-speed driving on the road. Here comes the security risk
[0004] In addition to the above, on the basis of the contradiction between the current special use environment of expressway pavement and the use requirements of pavement construction, fire safety, driving comfort and durability, it is difficult to apply concrete technology in large-scale practical projects. finally out of practical application

Method used

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  • Flexible early strength concrete and preparation method thereof
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  • Flexible early strength concrete and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A flexible early-strength concrete, such as figure 1 Shown, concrete components according to the amount (kg / m 3) is calculated as follows: cement 190kg, machine-made sand 853kg, gravel 1043kg, unsaturated polyester 316kg, initiator 13kg, accelerator 13kg, white latex 3kg. After the materials are ready, follow the steps below:

[0046] The first step: clean the inside and outside of the mold, and apply the release agent;

[0047] Step 2: Put sand, gravel, and cement into the iron basin in order of feeding from coarse to fine, and stir for 60 seconds until uniform;

[0048] The third step: at the same time as the second step, first add the initiator to the resin, stir evenly, then add the accelerator, stir evenly; then add the white latex to the resin, stir evenly;

[0049] Step 4: Add the resin mixture into the iron basin and stir for 60 seconds to obtain a flexible early-strength concrete of the present invention;

[0050] Step 5: Pour concrete into the treated mold...

Embodiment 2

[0056] A flexible early-strength concrete, such as figure 1 Shown, concrete components according to the amount (kg / m 3 ) is calculated as follows: cement 190kg, machine-made sand 853kg, gravel 1043kg, unsaturated polyester 316kg, initiator 13kg, accelerator 13kg, white latex 6kg. After the materials are ready, follow the steps below:

[0057] The first step: clean the inside and outside of the mold, and apply the release agent;

[0058] Step 2: Put sand, gravel, and cement into the iron basin in order of feeding from coarse to fine, and stir for 60 seconds until uniform;

[0059] The third step: at the same time as the second step, first add the initiator to the resin, stir evenly, then add the accelerator, stir evenly; then add the white latex to the resin, stir evenly;

[0060] Step 4: Add the resin mixture into the iron basin and stir for 60 seconds to obtain a flexible early-strength concrete of the present invention;

[0061] Step 5: Pour concrete into the treated mol...

Embodiment 3

[0067] A flexible early-strength concrete, such as figure 1 Shown, concrete components according to the amount (kg / m 3 ) is calculated as follows: cement 190kg, machine-made sand 853kg, gravel 1043kg, unsaturated polyester 316kg, initiator 13kg, accelerator 13kg, white latex 9kg. After the materials are ready, follow the steps below:

[0068] The first step: clean the inside and outside of the mold, and apply the release agent;

[0069] Step 2: Put sand, gravel, and cement into the iron basin in order of feeding from coarse to fine, and stir for 60 seconds until uniform;

[0070] The third step: at the same time as the second step, first add the initiator to the resin, stir evenly, then add the accelerator, stir evenly; then add the white latex to the resin, stir evenly;

[0071] Step 4: Add the resin mixture into the iron basin and stir for 60 seconds to obtain a flexible early-strength concrete of the present invention;

[0072] Step 5: Pour concrete into the treated mol...

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Abstract

The invention discloses flexible early strength concrete and a preparation method thereof. The flexible early strength concrete is prepared from a cementing material, manufactured sand, gravels, cement, an initiator, an accelerant and white latex, wherein a ratio of the cementing material to aggregates is 1:6, a sand ratio is 45%, a cement content is 10%, and a white latex content is 2%-4%. The white latex in the flexible early strength concrete has advantages of great film forming property, high adhesion strength, high curing speed and the like, thereby being a novel high-performance admixture. By a large admixing amount, normal-temperature curing is realized while high cementing strength and high curing speed of the early strength concrete are realized. The flexible early strength concrete is low in elasticity modulus, high in toughness and high in compressive strength, keeps advantages of normal concrete in construction, fireproof safety, durability and the like and also integrates traveling comfort of flexible pavement materials. Low consumption of the cementing material and excellent mechanical properties are realized, 6-hour compressive strength is not lower than 30MPa, and 7d compressive strength is 45.1MPa. In addition, large-scale production can be realized, and the flexible early strength concrete has a promising application prospect.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a flexible early-strength concrete and a preparation method thereof. Background technique [0002] Flexible concrete has the advantages of good durability, high toughness, high strength, low elastic modulus and suitable for road vehicles. Its technology development has become one of the concrete technologies that the construction industry focuses on and pays attention to. [0003] With the continuous construction of high-grade highways in my country, the grade of highways is also constantly improving, and the defects in the performance of cement concrete pavements are gradually emerging, which is not conducive to the high-speed, safe and comfortable driving of vehicles, specifically reflected in: (1) road surface The flatness is poor, and the driving comfort is not good. Cement concrete has a large modulus, strong shrinkage, and poor flatness. When a car runs on it, t...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/06C04B14/02C04B24/283C04B24/26C04B2103/12
Inventor 邓日富杨飞
Owner GUANGDONG UNIV OF TECH
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