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Concrete aggregate used for replacing crushed stone aggregate and related concrete

A technology of concrete aggregate and concrete, which is applied in the field of crushed stone aggregate for concrete and concrete, which can solve the problems of large fluctuations in the quality of crushed stone aggregate, non-reusable resources, and large environmental pollution, so as to achieve reusable resources and reduce The effect of unit weight and quality stability

Inactive Publication Date: 2017-09-05
SHANGHAI TUNNEL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many disadvantages such as large environmental pollution, large energy consumption, non-reusable resources, and large fluctuations in the quality of crushed stone aggregates.

Method used

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  • Concrete aggregate used for replacing crushed stone aggregate and related concrete
  • Concrete aggregate used for replacing crushed stone aggregate and related concrete
  • Concrete aggregate used for replacing crushed stone aggregate and related concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation and detection of embodiment 1 polyamide resin aggregate

[0043] Polyamide resin aggregates are processed and produced according to the requirements of continuous gradation of 5-16 (mm) in "JGJ52-2006 Standard for Quality and Inspection Methods of Sand and Stone for Ordinary Concrete". The polyamide resin aggregate is rounded by making an injection mold conforming to the continuous gradation of 5-16 (mm), and injection molded at high temperature. The particle gradation range of the polyamide resin aggregate is shown in Table 1, and the particle gradation curve is shown in figure 1 shown.

[0044] Table 1 Particle gradation of polyamide resin aggregate

[0045] diameter (mm) 2.5 5 10 16 Cumulative ratio (%) 100 96 52 4

[0046] Other indicators of polyamide resin aggregates are shown in Table 2.

[0047] Table 2 Other indicators of polyamide resin aggregate

[0048] index mud content Mud content Needle-like parti...

Embodiment 2

[0049] Example 2 Crushed stone aggregate detection

[0050] The crushed stone aggregate has been tested to meet the continuous gradation requirements of 5-16 (mm) in the "JGJ52-2006 Standard for Quality and Inspection Methods of Sand and Stone for Ordinary Concrete". The particle gradation range of crushed stone aggregate is shown in Table 3, and the particle gradation curve is shown in Table 3. figure 2 shown.

[0051] Table 3 Particle gradation of crushed stone aggregate

[0052] diameter (mm) 2.5 5 10 16 Cumulative ratio (%) 100 90 45 2

[0053] Other indicators of crushed stone aggregates are shown in Table 4.

[0054] Table 4 Other indicators of crushed stone aggregate

[0055] index mud content Mud content Needle-like particle content Compressive strength gravel aggregate 0.5％ 0％ 4％ 70 MPa

Embodiment 3

[0056] Embodiment 3 adopts polyamide resin aggregate and crushed stone aggregate to prepare concrete respectively

[0057] 1. Raw material and ratio

[0058] Polyamide resin aggregates and crushed stone aggregates were used to prepare concrete, and the mixing ratio of each raw material was carried out with reference to Table 5, which met the requirements of the JGJ55-2011 standard of "Common Concrete Combination Design Regulations". The tested polyamide resin aggregate has a density of 1450kg / m 3 , the density of crushed stone aggregate is 2640kg / m 3 , using the method of equal volume replacement, first calculate the volume of crushed stone in each square of concrete, and calculate the amount of resin aggregate according to the density of resin aggregate and the volume to be filled, that is: volume * density = quantity, Due to the large difference in the density of the two different aggregates, the calculated unilateral dosage also has a large difference.

[0059] Table 5 R...

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Abstract

The invention provides a concrete aggregate used for replacing crushed stone aggregate. The concrete aggregate is a resin aggregate; and preferably, the resin aggregate is a circular-grain resin aggregate. The grain composition of the resin aggregate meets requirements as prescribed in table 3.2.1-2 in Standards for Quality and Inspection Methods of Sand and Stone Applied to Common Concrete JGJ52-2006. The mud content and clay lump content of the resin aggregate are both 0 wt%; the content of elongated and flaky particles in the resin aggregate is 0 wt%; and the resin aggregate has comprehensive strength of 100 MPa. The resin aggregate is polyamide resin aggregate. The invention also provides concrete containing the above replacing aggregate instead of crushed stone aggregate. The replacing aggregate for concrete provided by the invention can replace crushed stone aggregate in preparation of concrete; and the aggregate is environment-friendly and energy-saving to prepare, realizes recycling of resources, is stable in quality, has the characteristics of light weight and cuttability and is suitable for large-scale promotion and application.

Description

technical field [0001] The present invention relates to the technical field of concrete, more specifically, to the technical field of crushed stone aggregates for concrete, in particular to a concrete aggregate used to replace crushed stone aggregates and related concrete. Background technique [0002] Concrete is mainly composed of cementitious materials, sand, gravel, and water. Because crushed stone aggregate is an indispensable material in concrete, it plays a supporting role in concrete, so it is called coarse aggregate. Its production is through mountain blasting in quarries, mechanical crushing of natural rocks, and sieving of ores into granules of various levels. However, there are many disadvantages such as large environmental pollution, large energy consumption, non-reusable resources, and large fluctuations in the quality of crushed stone aggregates. [0003] Therefore, it is necessary to provide a crushed stone aggregate for concrete instead of aggregate, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B16/04C04B28/04C04B111/40
Inventor 应卓清朱海良张召昆许兴旺
Owner SHANGHAI TUNNEL ENG CO LTD
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