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Grouting riprap concrete preparation method

A technology of concrete and waste concrete blocks, which is applied in construction, infrastructure engineering, etc., can solve problems such as high cost, low efficiency, and slow construction progress, and achieve the effects of reducing fluidity, simplifying the preparation process, and improving construction efficiency

Inactive Publication Date: 2016-08-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of slow construction progress, low efficiency and high cost in the preparation of concrete in the construction of large-diameter pile foundations or raft foundations and dams in the prior art, and further needs to provide a preparation method for grouting riprap concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific embodiment one: the grouting riprap concrete preparation method described in this embodiment is carried out according to the following steps:

[0017] Step 1: Preparatory work: Prepare the materials required for concrete such as cement, water, fine sand, stones, UEA expansion agent and FDN water reducing agent, and form holes according to the construction requirements;

[0018] Step 2: Prepare mortar: Add cement, fine sand, UEA expansion agent and FDN water reducer to the mixing tank, and finally add water, wherein the water-cement ratio W / C is less than or equal to 0.50; the sand rate is less than or equal to 42%; UEA expansion The content of water reducing agent accounts for 8% to 12% of the mass of the gelling material; the content of FDN water reducer accounts for 0.2% to 1% of the mass of the gelling material;

[0019] Step 3: Grouting: inject the mixed mortar into the space surrounded by the template or into the hole of the cast-in-place pile;

[0020] S...

specific Embodiment approach 2

[0022] Specific implementation mode two: the preparation method of grouting riprap concrete described in this implementation mode, the stones thrown in the step four are ordinary stones, waste concrete blocks, or any combination of several materials, and the others are the same as in the specific embodiment one .

specific Embodiment approach 3

[0023] Specific implementation mode three: the preparation method of grouting riprap concrete described in this implementation mode, the maximum size of ordinary stones or waste concrete blocks in step 4 is less than or equal to 3 / 4 of the minimum size of the poured component cross-section, other and specific Embodiment 1 or 2 are the same.

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Abstract

The invention relates to a concrete preparation method, in particular to a grouting riprap concrete preparation method. The problems that the construction progress is slow, the efficiency is low, and the cost is high during concrete preparation in construction of large-diameter pile foundations or raft foundations and dams in the prior art are solved. The grouting riprap concrete preparation method includes the following steps that (1) preparatory work is performed, specifically, materials needed by concrete are prepared, and formwork supporting or filling pile pore-forming is conducted according to the construction requirements; (2) mortar is prepared, specifically, cement, fine sand, a UEA expanding agent and an FDN water reducing agent are added into a stirring pool, and finally water is added; (3) grouting is performed, specifically, the stirred mortar is poured into a space defined by form boards or filling pile formed pores; and (4) stone is applied, specifically, the stone is put in the cement mortar in the form boards. The grouting riprap concrete preparation method is applied to the technical field of civil engineering materials.

Description

technical field [0001] The invention relates to a method for preparing concrete, in particular to a method for preparing grouting riprap concrete. Background technique [0002] The concrete preparation process in the prior art includes aggregate crushing, uniform mixing of raw materials, pumping and pouring and other processes. There are many construction procedures, and the performance requirements of concrete such as slump and permeability are relatively high. In large-volume concrete structures, such as large-diameter pile foundations, raft foundations, and dam construction, the use of ordinary concrete preparation methods will bring problems such as slow construction progress, low efficiency, and high costs. Contents of the invention [0003] In order to solve the problems of slow construction progress, low efficiency and high cost in concrete preparation in large-diameter pile foundation or raft foundation and dam construction in the prior art, the present invention f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02C04B28/00
CPCE02D15/02C04B28/00C04B14/06C04B14/04C04B2103/302
Inventor 郑文忠包必生王英周威
Owner HARBIN INST OF TECH
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