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A kind of high water retention cement

A water retention and cement technology, applied in the field of cement, can solve the problems of decreased utilization rate, consumption, low utilization value, etc., and achieve the effect that the process is easy to achieve

Active Publication Date: 2016-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main component is calcium carbonate. Because it contains percalcined calcium oxide, it has been used for road paving and shaft kiln cement raw materials for a long time. Although its use value is low, most of it can be consumed
However, with the improvement of road quality requirements and the elimination of shaft kiln cement plants, its utilization rate has declined instead, and it is urgent to find new ways of utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high water-retaining cement, consisting of the following mass percentages:

[0029] Portland cement clinker 25

[0030] Mixture containing sand and stone powder and alkali slag after dechlorination 10

[0031] Granulated blast furnace slag 30

[0032] Fly Ash 22

[0033] plaster 12

[0034] Grinding aid 0.5

[0035] Early strength agent 0.5.

[0036] Further, the mixture comprising sand-returning stone powder and alkali slag after dechlorination is prepared by the following steps:

[0037] Step 1. First, crush and grind the returned sand and stone back into sand and back stone powder, soak in water for 0.5 days to digest the burnt calcium oxide, and obtain the digested back sand and back stone powder;

[0038] Step 2. Mix the digested sand-returning-stone powder, alkali slag, and water, and perform pressure filtration to obtain a chloride ion content of less than 0.09% of the total mass of solids in the mixture, which includes sand-returning stone powder and alk...

Embodiment 2

[0043] A high water-retaining cement, consisting of the following mass percentages:

[0044] Portland cement clinker 28

[0045] Mixture containing sand and stone powder and alkali slag after dechlorination 20

[0046] Granulated blast furnace titanium slag 10

[0047] Granulated blast furnace slag 40

[0048] plaster2.

[0049] Further, the mixture comprising sand-returning stone powder and alkali slag after dechlorination is prepared by the following steps:

[0050] Step 1. First crush and grind the returned sand and stone back into sand and back stone powder, soak in water for 1 day to digest the burnt calcium oxide, and obtain the digested back sand and back stone powder;

[0051] Step 2. Mix the digested sand-returning stone powder, alkali slag, and water, and perform pressure filtration to obtain a chloride ion content of less than 0.08% of the total solid mass in the mixture, which includes sand-returning stone powder and alkali slag after chlorine removal. In term...

Embodiment 3

[0056] A high water-retaining cement, consisting of the following mass percentages:

[0057] Portland cement clinker 40

[0058] Mixture containing sand and stone powder and alkali slag after dechlorination 15

[0059] Pozzolanic Mixture 30

[0060] Silica fume 6

[0061] Gypsum 8

[0062] Early strength agent 1.

[0063] Further, the mixture comprising sand-returning stone powder and alkali slag after dechlorination is prepared by the following steps:

[0064] Step 1, first crushing and grinding the returned sand and stone back into sand and back stone powder, soaking in water for 3 days to digest the burnt calcium oxide, and obtaining the digested back sand and back stone powder;

[0065] Step 2. Mix the digested sand-returning stone powder, alkali slag, and water, and perform pressure filtration to obtain a chloride ion content of less than 0.05% of the total solid mass in the mixture, which includes sand-returning stone powder and alkali slag after chlorine removal. ...

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PUM

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Abstract

The invention discloses a high water-retaining cement, which is composed of Portland cement clinker, a mixture containing sand-returning stone powder and alkali slag after chlorine removal, mixed materials, gypsum and other additives. The cement water-retaining component of the present invention includes a mixture of sand-returning stone powder and alkali slag after chlorine removal is an inorganic material, and there is no problem of decomposition and failure of organic materials, and the water retention rate of cement is not lower than 90%; existing cement plant equipment can be used The production process is easy to realize; it can simultaneously eliminate the bulk solid waste of the soda ash plant - alkali slag and returned sand and stone, and can use part of the calcium hydroxide for soda ash production.

Description

technical field [0001] The invention belongs to the field of cement, in particular to a cement with high water retention. Background technique [0002] General cement takes strength as the main control index, but the cement used in masonry mortar and plastering mortar, in order to avoid the hollowing and cracking of the mortar caused by the large amount of water absorbed by the wall material, the cement also needs to have high water retention. [0003] In order to solve the above problems, the applicant has developed ZL200610035113.0 new type of masonry cement with high water retention, and improved the water retention of masonry cement by adding cellulose ether (other additives can also be added at the same time) to the traditional masonry cement composition (Water retention rate exceeds 90%), and optimize the type and amount of mixed materials according to the performance requirements of cement, and the amount of mixed materials is 50-93%. [0004] However, cellulose ethe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/26C04B7/28C04B7/21
CPCY02P40/10
Inventor 杨医博郭文瑛莫海鸿王恒昌
Owner SOUTH CHINA UNIV OF TECH
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