Mixed sand wet mixed mortar and preparation method thereof

A technology of wet-mixing mortar and mixed sand, which is applied in the field of building materials, can solve the problems of shortage of natural river sand resources and the inability of ore sand to replace natural river sand, and achieve the effects of wide sources, convenient construction, and excellent mechanical properties

Inactive Publication Date: 2019-08-13
CNBM ZHONGYAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is a shortage of natural river sand resources, and ore sand is the most potential substitute for natural river sand, but generally a single ore sand cannot replace natural river sand, and a combination of various ore sands is required

Method used

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  • Mixed sand wet mixed mortar and preparation method thereof
  • Mixed sand wet mixed mortar and preparation method thereof
  • Mixed sand wet mixed mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The preparation method of mixed sand wet-mixed mortar comprises the steps of:

[0041] 1) Mix and stir cement, fly ash, machine-made sand, and tailings sand evenly to obtain a dry mortar mixture;

[0042] 2) Dissolve water reducer, thickener and retarder in 7~12 parts of mixing water, then pour into the dry mortar mixture obtained in step 1), and stir evenly;

[0043] 3) Add the remaining mixing water and continue to mix evenly to obtain a mixed sand wet-mixed mortar.

Embodiment 1

[0045] A mixed sand wet-mixed mortar, which is composed of the following materials in parts by weight: 9.8 parts of cement, 4 parts of fly ash, 73.5 parts of mixed sand (including 29.4 parts of machine-made sand and 44.1 parts of tailing sand), and 0.14 parts of water reducer , 0.24 parts of thickener, 0.42 parts of retarder, 11.9 parts of water.

[0046] The cement used is PO42.5 ordinary Portland cement, and the fly ash is Class II fly ash used in construction engineering; the machine-made sand has been washed and de-powdered, the methylene blue index is lower than 0.5, and the fineness modulus is 3.2 to 3.4, the fineness modulus of the tailings sand is 1.1 to 1.3, and the fineness modulus of the mixed sand in this embodiment is 2.1.

[0047] The water reducer is polycarboxylate high-efficiency water reducer, the thickener is hydroxypropyl methylcellulose ether, and the retarder is sodium gluconate. Under the joint action of the three admixtures, the consistency and working...

Embodiment 2

[0053] A mixed sand wet-mixed mortar, which is composed of the following materials in parts by weight: 11.7 parts of cement, 4.2 parts of fly ash, 71.1 parts of mixed sand (including 35.4 parts of machine-made sand and 35.7 parts of tailing sand), and 0.15 parts of water reducer , 0.27 parts of thickener, 0.48 parts of retarder, 12.1 parts of water.

[0054] The cement used is PO42.5 ordinary Portland cement, and the fly ash is Class II fly ash used in construction engineering; the machine-made sand has been washed and de-powdered, the methylene blue index is lower than 0.5, and the fineness modulus is 3.2 to 3.4, the fineness modulus of the tailings sand is 1.1 to 1.3, and the fineness modulus of the mixed sand in this embodiment is 2.3.

[0055] The water reducer is polycarboxylate high-efficiency water reducer, the thickener is hydroxypropyl methylcellulose ether, and the retarder is sodium gluconate. Under the joint action of the three admixtures, the consistency and work...

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Abstract

The invention discloses mixed sand wet mixed mortar and a preparation method thereof, and belongs to the field of building materials. The mortar is prepared from, by weight, 5-15 parts of cement, 2-6parts of coal ash, 40-100 parts of mixed sand, 0.1-0.2 part of a water reducing agent, 0.1-0.5 part of a thickening agent, 0.2-0.8 part of a retarder and 10-15 parts of water; the mixed sand is composed of machine-made sand and tailing sand. The industrial by-product tailing sand and abundant machine-made sand are sufficiently utilized, the fineness modulus of the mixed sand and the compact stacking state of a mortar mixture are regulated by regulating the mixing ratio of the mixed sand and the consumption of a binding material, and the mixed sand wet mixed mortar with the advantages of the machine-made sand and the tailing sand, the good working performance, convenient construction, excellent mechanical performance and outstanding durability is obtained. The wet mixed mortar is good in hardened compressive strength and good in durability.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a mixed sand wet-mixed mortar and a preparation method thereof. Background technique [0002] Ready-mixed wet-mixed mortar is a new type of scientific and environmentally friendly building material. It is composed of cement gelling components, fine aggregates, water-retaining thickening additives, mineral admixtures and water, etc. after scientific calculation and proportioning. After accurate measurement and standard mixing in a professional factory, it is transported to the construction site by a special mortar mixer truck, stored in a specified airtight container, and used up within the specified time. [0003] In recent years, in order to meet the increasingly high requirements of large and medium-sized cities for construction mortar, improve the quality of construction mortar, speed up the civilized construction process, and strengthen the environmental protection of urban ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/06C04B18/12C04B24/24C04B24/383C04B24/06
Inventor 马强单立福袁连旺范德科尹润平王金邦周宗辉
Owner CNBM ZHONGYAN TECH
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