Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof

A technology of fine fiber and stone bone, applied in the field of modified stone aggregate, can solve the problems of easy cracking, adverse effect of interface bonding, low strength of interface transition zone, etc., achieves simple construction at room temperature, and inhibits alkali-aggregate reaction. Good effect, good durability effect

Inactive Publication Date: 2010-10-20
NANTONG ZHONGRUN CONCRETE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more weaker Ca(OH) in the interface region 2 Crystal, the number of pores in the interface area is more than that in the cement stone area. These characte

Method used

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  • Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof
  • Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0024] Example 1

[0025] A stone aggregate coated with a thin layer of microfiber polymer mortar, comprising: a stone aggregate core 1, an adhesive inner coating layer 2 is wrapped on the outer surface of the stone aggregate core 1, and the adhesive inner coating layer 2 is outside A polymer cement mortar outer coating 3 is wrapped on the surface, an adhesive microfiber batt 4 is connected to the adhesive inner coating 2 and the fibers on the adhesive microfiber batt 4 extend to the polymer cement mortar The exterior of the outer wrap 3.

Example Embodiment

[0026] Example 2

[0027] A method for preparing stone aggregate covered with a thin layer of fine fiber polymer mortar,

[0028] Step 1 Wash and dry the stone aggregate core 1 and spray organic adhesive on the surface of the stone aggregate core 1 or immerse the washed and dried stone aggregate core 1 in the organic adhesive to form on the surface of the stone aggregate core 1 A layer of adhesive inner coating 2 with a thickness of 20μm~30μm,

[0029] Step 2 While stirring the stone aggregate with adhesive, spray the fine fiber while mixing it evenly to form the stone aggregate glued fine fiber hair layer 4.

[0030] Step 3 The polymer cement mortar outer coating layer 3 uses the organic and inorganic polymer cement paste as the outer coating material, and the polymer cement paste is covered on the surface with the adhesive inner coating layer 2 On the core 1 of the stone aggregate,

[0031] Step 4 Put the stone aggregate obtained in step 3 into the steam curing tank, stop for 1 hour...

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Abstract

The invention discloses a stone aggregate wrapped by a microfine fibre polymer mortar thin layer and a preparation method thereof; the stone aggregate is formed by stone aggregate inner cores, an adhesive inner wrapping layer, a polymer cement mortar outer wrapping layer and an adhesive microfine fibre hair layer, wherein the adhesive inner wrapping layer and the stone aggregate are adhered firmly; microfine fibre filaments are anchored and rooted on the adhesive inner wrapping layer; and the polymer cement mortar outer wrapping layer and the adhesive inner wrapping layer are soluble mutually and can effectively form a whole body. Active powder in the polymer cement mortar outer wrapping layer contains silica fume, zeolite powder, finely-ground mineral slag, pulverized coal ash and the like, and can generate volcanic ash reaction with Ca(OH)2 crystal at the interface position of the set cement so as to generate gelled materials, and further carry out improved treatment on the weakest interfaces of set cement and the stone aggregate in concrete. The modified stone aggregate of the invention has good affinity with the set cement, and has higher binding power with the set cement.

Description

Technical field [0001] The invention relates to a modified stone aggregate, which is beneficial to improve the bonding performance of the stone aggregate and cement stone interface, can increase the compressive strength of concrete products, and improve the use performance of concrete products. Background technique [0002] When concrete is mixed with superplasticizer, fly ash, silica fume, zeolite, steel fiber, polypropylene fiber, it can effectively improve the strength and other performance of concrete. However, the microscopic analysis of concrete shows that the incorporation of water-reducing agent, active powder and fiber can only effectively improve the compactness and mechanical strength of cement stone in concrete, and the bonding force to the transition zone between the aggregate and cement stone interface. The improvement effect is not obvious, and there are areas where the interface between stone aggregate and cement stone is weak. [0003] The strength of concrete is ...

Claims

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Application Information

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IPC IPC(8): C04B16/06C04B14/38C04B14/02
Inventor 徐文平钟华周剑峰杨江金李亚枫陈新杰蒋百堂
Owner NANTONG ZHONGRUN CONCRETE
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