Premixing mortar with high moisture retention and production method thereof

A technology of ready-mixed mortar and production method, applied in the field of mortar, can solve the problems of unstable fine aggregate gradation, unstable mortar performance, failure to meet performance requirements, etc., so as to improve and ensure the quality of masonry and the quality of mortar And masonry quality, the effect of accurate ratio

Inactive Publication Date: 2009-09-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the fine aggregate does not need to be dried, the fine aggregate is often not treated in actual use, which makes the gradation of the fine aggregate unstable, and the content of harmful substances (such as chloride ions, mud content, etc.) may exceed the standard. And this will also lead to unstable performance of the mortar, or even fail to meet the performance requirements, resulting in quality accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A new type of ready-mixed mortar with high water retention, its raw material formula is:

[0053] High water retention cement 100kg

[0054] Fine aggregate 500kg

[0055] water 70kg

[0056] Among them, the high water-retaining cement is a 22.5-grade new masonry cement containing cellulose ether components and a water retention rate exceeding 90%. The new masonry cement is prepared according to Example 1 of Patent No. ZL 200610035113.0.

[0057] The fine aggregate is river sand that has been treated by screening and grading and removing harmful substances (water washing method to reduce mud content). The maximum particle size is 1.8mm. The excess is 18%, the cumulative sieve excess of 0.6mm is 48%, the cumulative sieve excess of 0.3mm is 71%, the cumulative sieve excess of 0.15mm is 97%, and the mud content is 1.0%. Fine aggregates are not dried.

[0058] The production method is to transport the bulk high water-retaining cement directly to the storage tank of the mo...

Embodiment 2

[0062] A new type of ready-mixed mortar with high water retention, its raw material formula is:

[0063] High water retention cement 100kg

[0064] Fine aggregate 800kg

[0065] water 180kg

[0066]Other additives 14kg

[0067] Among them, the high water-retaining cement is a 32.5-grade new masonry cement containing cellulose ether components and a water retention rate exceeding 90%. The new masonry cement is prepared according to Example 2 of Patent Application No. 200710031351.9.

[0068] The fine aggregate is machine-made sand prepared from steel slag that has been screened and graded. The maximum particle size is 2.36mm. The sieve residue is 49%, the 0.3mm cumulative sieve residue is 70%, the 0.15mm cumulative sieve residue is 85%, and the stone powder content is 8.0% (methylene blue test is qualified).

[0069] Based on the percentage by weight of other additives, other additives consist of 40% first grade fly ash produced by Huangpu Power Plant, 50% S95 grade granula...

Embodiment 3

[0075] A new type of ready-mixed mortar with high water retention, its raw material formula is:

[0076] High water retention cement 100kg

[0077] Fine aggregate 300kg

[0078] water 50kg

[0079] Other additives 0.25kg

[0080] Among them, the high water-retaining cement is a 12.5-grade new masonry cement containing cellulose ether components and a water retention rate exceeding 90%. The new masonry cement is prepared according to Example 5 of Patent No. ZL 200610035113.0.

[0081] The fine aggregate is sea sand that has been screened and graded and washed to remove chloride ions, and its maximum particle size is 1.5mm (the maximum particle size of plastering mortar is relatively small due to the requirement of surface smoothness); in fine aggregate, 2.36 mm cumulative sieve residue is 0%, 1.18mm cumulative sieve residue is 15%, 0.6mm cumulative sieve residue is 42%, 0.3mm cumulative sieve residue is 75%, 0.15mm cumulative sieve residue is 98%, mud content is 0.5% , the ...

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PUM

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Abstract

The invention discloses pre-stirring mortar with high moisture retention and a production method thereof. The premixing mortar comprises the following components by weight ratio: 100 parts of cement with the high moisture retention, 1 to 900 parts of fine aggregate and 30 to 200 parts of water, wherein the cement with the high moisture retention contains a cellulose ether component and has the moisture retention above 90 percent; and the fine aggregate is natural sand or artificial sand obtain through screen sizing or removing harmful components, and has the maximum grain diameter of 1.18 mm to 2.36 mm. The production method comprises the following steps: arranging a mortar stirring machine on a construction site or nearby; adopting the cement with the high moisture retention and the fine aggregate to automatically meter and stir, enable mortar to be usable while stirring, and the like to ensure the mortar quality; and adopting a closed stirring mode, a dust-collecting mode and the like to reduce dust raise. The pre-stirring mortar can effectively improve and ensure the qualities of the mortar buildings, obviously improves the construction environment, greatly decreases the production cost of the pre-stirring mortar and solves the difficult problems that the prior pre-stirring mortar has over-high cost and are difficult to popularize and apply.

Description

technical field [0001] The invention relates to the field of mortar, in particular to a novel ready-mixed mortar with high water retention and a production method thereof. Background technique [0002] Traditionally in China, sintered bricks (red bricks, etc.) are used as wall materials, and on-site mixing mortar (mainly cement mortar or cement-lime mixed mortar) is used for masonry building and plastering. In order to save cultivated land, promote the application of solid waste, and reduce building energy consumption, my country carried out wall material reform and building energy-saving work in the 1990s, and vigorously developed new wall materials. Enough attention, this also raises a series of questions. [0003] Traditional on-site mixing mortar is mainly used with sintered bricks. Since the water retention rate of mortar is not high, sintered ordinary bricks need to be watered before use (also known as wet construction) in order to increase the cohesion between mortar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B24/02C04B103/46
CPCC04B2103/46C04B28/02
Inventor 杨医博郭文瑛梁松莫海鸿陈尤雯
Owner SOUTH CHINA UNIV OF TECH
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