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Cement with high water-retaining property

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: 2014-12-10
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] Chlor-alkali residue mixture 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 chlor-alkali slag mixture 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, after mixing the digested sand-returning stone powder, alkali slag, and water, perform press filtration to obtain a chlorine-alkali slag removal mixture with a chloride ion content lower than 0.09% of the total solid mass in the mixture, in terms of mass percentage of the material, The mixture is composed of the following components: the ratio of the d...

Embodiment 2

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

[0044] Portland cement clinker 28

[0045] Chlor-alkali residue mixture 20

[0046] Granulated blast furnace titanium slag 10

[0047] Granulated blast furnace slag 40

[0048] plaster 2.

[0049] Further, the chlor-alkali slag mixture 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, after mixing the digested sand-returning stone powder, alkali slag, and water, carry out pressure filtration treatment to obtain a chlorine-alkali slag removal mixture with a chloride ion content lower than 0.08% of the total solid mass in the mixture, in terms of mass percentage of the material, The mixture is composed of the following components: the ratio of the dry mass of the digest...

Embodiment 3

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

[0057] Portland cement clinker 40

[0058] Chlor-alkali residue mixture 15

[0059] Pozzolanic mix 30

[0060] Silica fume 6

[0061] plaster 8

[0062] Early strength agent 1.

[0063] Further, the chlor-alkali slag mixture 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, after mixing the digested sand-returning stone powder, alkali slag, and water, carry out pressure filtration treatment to obtain a chlorine-alkali slag removal mixture with a chloride ion content lower than 0.05% of the total solid mass in the mixture, in terms of mass percentage of the material, The mixture is composed of the following components: the ratio of the dry mass of the dige...

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PUM

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Abstract

The invention discloses cement with high water-retaining property. The cement with high water-retaining property consists of silicate cement clinker, a dechlorination caustic sludge mixture, a mixed material, gypsum and other auxiliaries. The water-retaining component dechlorination caustic sludge mixture of the cement is an inorganic material, so that the decomposition failure problem of organic materials is unavailable and the water-retaining rate of the cement is not lower than 90%; the cement can be produced by equipment in the existing cement plants so that the process is easy to realize; and the large solid waste such as caustic sludge and returned sand and rocks of the soda plants can be digested at the same time, and soda ash can be produced by using part of the calcium hydroxide.

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 developed ZL 200610035113.0, a 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 composition of traditional masonry cement (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 e...

Claims

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Application Information

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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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