Semi-rigid building solid waste self-curing roadbed and preparation method and application thereof

A self-maintaining, semi-rigid technology, used in construction, solid waste management, roads, etc., can solve problems such as poor crack resistance, pavement structure damage, pavement structure fatigue damage, etc. The effect of cracking performance and improving the service life

Active Publication Date: 2020-08-07
SHANDONG UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cement-stabilized macadam base is the main semi-rigid base of expressways in my country. It has high strength and good integrity, but its crack resistance is poor. It is believed that the semi-rigid base layer has poor deformation resistance and is prone to cracks, and cracks are the fatal flaw of the semi-rigid base layer
Cracks often appear on cement-stabilized macadam semi-rigid base pavement. This is due to the poor crack resistance of the cement-stabilized macadam base. Due to early cement hydration and other influencing factors, a large number of early microscopic cracks appear in cement-stabilized macadam materials. Under the repeated action of load, the microscopic cracks further develop and expand, and finally reflect to the entire pavement to form macroscopic cracks, resulting in the destruction of the pavement structure and early fatigue damage of the pavement structure

Method used

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  • Semi-rigid building solid waste self-curing roadbed and preparation method and application thereof
  • Semi-rigid building solid waste self-curing roadbed and preparation method and application thereof

Examples

Experimental program
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no. 1 example

[0028] A preparation of a semi-rigid building solid waste self-maintaining roadbed, comprising the following steps:

[0029] (1) Destroy the construction waste into aggregates with a particle size of 5-40mm, and place the broken aggregates in a tube mill without grinding bodies and stir for 10 minutes, so that the fragile cement blocks in the aggregates can be ground and sieved and pre-wetted with 30% water of aggregate mass to obtain recycled aggregate.

[0030] (2) The raw materials are weighed according to the following mixing ratio: P.O 42.5 5% of cement, 5% of lime, 60% of recycled aggregate, 30% of crushed stone, and water is 8% of the solid mass of the first three.

[0031] (3) Mix cement, lime, crushed stone and recycled aggregate evenly; then add water and mix evenly to get the product.

no. 2 example

[0033] A preparation of a semi-rigid building solid waste self-maintaining roadbed, comprising the following steps:

[0034] (1) The construction waste is broken into aggregates with a particle size of 5-40 mm, and the broken aggregates are placed in a tube mill without grinding bodies and stirred for 10 minutes, so as to grind and screen the fragile cement blocks in the aggregates , and pre-wet with 30% water of aggregate mass to obtain recycled aggregate.

[0035] (2) The raw materials are weighed according to the following proportions: P.O 42.5 5% of cement, 5% of lime, 60% of recycled aggregate, 30% of crushed stone, water is 15% of the first three solid masses, and the addition of PVA fiber is 0.8kg / m 3 , The amount of super absorbent resin added is 0.6kg / m 3 .

[0036] (3) Mix cement, lime, gravel and recycled aggregate evenly; add PVA fiber and superabsorbent resin and mix evenly; then add water and mix evenly to get the product.

no. 3 example

[0038] A preparation of a semi-rigid building solid waste self-maintaining roadbed, comprising the following steps:

[0039] (1) The construction waste is broken into aggregates with a particle size of 5-40 mm, and the broken aggregates are placed in a tube mill without grinding bodies and stirred for 10 minutes, so as to grind and screen the fragile cement blocks in the aggregates , and pre-wet with 30% water of aggregate mass to obtain recycled aggregate.

[0040] (2) Weigh the raw materials according to the following proportions: P.O 42.5 5% of cement, 5% of lime, 60% of recycled aggregate, 30% of gravel, water is 8% of the solid mass of the first three, and the content of PVA fiber is 0.8 kg / m 3 , super absorbent resin 0.6kg / m 3 , water-absorbent cellulose fiber 0.4kg / m 3 .

[0041] (3) Mix cement, lime, crushed stone and recycled aggregate evenly; add PVA fiber, superabsorbent resin and water-absorbent cellulose fiber and mix evenly; then add water and mix evenly to o...

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Abstract

The invention relates to the technical field of self-curing roadbeds, in particular to a semi-rigid building solid waste self-curing roadbed and a preparation method and application thereof. The self-curing roadbed comprises the following components in percentage by mass: 4-12% of cement, 20-70% of recycled aggregate, 20-70% of gravels, 4-10% of lime, 0.6-1.2 kg / m<3> of matrix fiber reinforcements, 0.2-1 kg / m<3> of super absorbent resin and 0.2-1 kg / m<3> of water-absorbing cellulose fibers. The preparation method of the recycled aggregate comprises the following steps: crushing waste concreteto form an aggregate precursor, stirring the aggregate precursor in a grinding device without a grinding body, and pre-wetting the obtained aggregate to obtain the recycled aggregate. According to theinvention, particles and corners which are easy to fall off are removed through mechanical activation, so the performance of the recycled aggregate is improved. Meanwhile, the aggregate is pre-wettedby utilizing the porous water absorption characteristic of the recycled aggregate, so cracking of the cement stabilized macadam roadbed can be reduced.

Description

technical field [0001] The invention relates to the technical field of self-maintaining roadbed, in particular to a semi-rigid building solid waste self-maintaining roadbed and its preparation method and application. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Cement-stabilized macadam base is the main semi-rigid base of expressways in my country. It has high strength and good integrity, but its crack resistance is poor. The point of view is that the semi-rigid base has poor deformation resistance and is prone to cracks, and cracks are fatal defects of semi-rigid bases. Cracks often appear on cement-stabilized macadam semi-rigid base pavement. This is du...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B20/02E01C3/00C04B18/16C04B111/34
CPCC04B28/10E01C3/00C04B20/026C04B20/02C04B2111/0075C04B2201/50C04B2111/343C04B7/02C04B18/16C04B14/02C04B16/0641C04B2103/0051C04B18/24Y02W30/91
Inventor 李召峰邹泰裴文晶周新波林春金张宁
Owner SHANDONG UNIV
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