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Method for preparing high-seepage-resistance calcium sulfoaluminate concrete

A technology of sulphoaluminate and sulphoaluminate cement, which is applied in the field of concrete materials, can solve problems such as poor durability, easy aging, and easy combustion, and achieve excellent impermeability and erosion resistance, simple preparation method, and improved effect of density

Active Publication Date: 2012-10-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a long time, there are many ways to solve the problem of concrete impermeability, but the most widely used is to lay waterproof membranes or apply waterproof coatings on the concrete surface. Water seepage in the area, the latter is easy to age and has poor durability. The above post-repair measures are all palliatives, not the root cause

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The aggregate particle size and the corresponding parts by weight of the aggregate are as follows:

[0022] Fine aggregate particle size parts by weight Coarse aggregate particle size parts by weight 0.075~0.15mm 2.56 2.36~4.75mm 17.36 0.15~0.3mm 3.75 4.75~9.5mm 25.05 0.3~0.6mm 5.72 9.50~16mm 26.04 0.6~1.18mm 7.89 1.18~2.36mm 11.64

[0023] Raw materials and parts by weight of high impermeability concrete:

[0024] Sulphoaluminate cement 18.12

[0025] Aggregate 75.16

[0026] water 6.34

[0027] Polycarboxylic acid 0.36

[0028] Boric acid 0.02

[0029] Concrete molding process, weighing raw materials according to the concrete mix ratio, the mixing method adopts a three-step mixing process: first add 18.12 parts of sulphoaluminate cement, 0.02 parts of boric acid and 3.17 parts of water and stir for 30 seconds, then add 75.16 parts of aggregate The material was stirred for 60s, and finally ...

Embodiment 2

[0032] The aggregate particle size and the corresponding parts by weight of the aggregate are as follows:

[0033] Fine aggregate particle size parts by weight Coarse aggregate particle size parts by weight 0.075~0.15mm 3.52 2.36~4.75mm 17.49 0.15~0.3mm 5.00 4.75~9.5mm 23.31 0.3~0.6mm 6.94 9.50~16mm 22.61 0.6~1.18mm 8.95 1.18~2.36mm 12.18

[0034] The parts by weight of each raw material and its components in the concrete are:

[0035] Sulphoaluminate cement 21.55

[0036] Aggregate 71.75

[0037] water 6.45

[0038] Polycarboxylate 0.22

[0039] Boric acid 0.03

[0040] Concrete molding process, weighing raw materials according to the mix ratio, the mixing method adopts a three-step mixing process: first add 21.55 parts of sulphoaluminate cement, 0.03 parts of boric acid and 3.23 parts of water and stir for 35 seconds, then add 71.75 parts of aggregate and stir 70s, finally add 0.22 parts of ...

Embodiment 3

[0043] The aggregate particle size and the corresponding parts by weight of the aggregate are as follows:

[0044] Fine aggregate particle size parts by weight Coarse aggregate particle size parts by weight 0.075~0.15mm 5.37 2.36~4.75mm 19.42 0.15~0.3mm 7.02 4.75~9.5mm 17.77 0.3~0.6mm 8.68 9.50~16mm 16.12 0.6~1.18mm 11.16 1.18~2.36mm 14.46

[0045] The parts by weight of each raw material and its components in the concrete are:

[0046] Sulphoaluminate cement 27.00

[0047] Aggregate 65.91

[0048] water 6.75

[0049] Polycarboxylate 0.30

[0050] Boric acid 0.04

[0051] Concrete molding process, weighing raw materials according to the mixing ratio, the mixing method adopts a three-step mixing process: first add 27.00 parts of sulphoaluminate cement, 0.04 parts of boric acid and 3.38 parts of water and stir for 25 seconds, then add 65.91 parts of aggregate and stir 60s, finally add 0.30 parts...

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Abstract

The invention relates to a method for preparing high-seepage-resistance calcium sulfoaluminate concrete. The high-seepage-resistance calcium sulfoaluminate concrete is prepared by steps: taking calcium sulfoaluminate cement accounting for 17.00%-25.00% of the total weight of concrete, retarder accounting for 0.01%-0.04% of the total weight of concrete and water accounting for 2.55%-5.25% of the total weight of concrete, and mixing for 20-40s; adding aggregates accounting for 65.00%-80.00% of the total weight of concrete, and mixing for 50-70s; and adding water reducing agent accounting for 0.10%-1.00% of the total weight of concrete and water accounting for 2.55%-5.25% of the total weight of concrete, and mixing for 50-70s, wherein the aggregates are proportionally composed of particles of different diameters. Operability of concrete compactness is realized by regulating mass fraction of the aggregates of each grade. The seepage resistance grade of the concrete prepared by the method is higher than P20, and the concrete has excellent seepage resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a preparation method of high anti-seepage sulfoaluminate concrete, which belongs to the technical field of concrete materials. Background technique [0002] Leakage has always been the most prominent quality problem of concrete structures. The fatal damage of concrete structures such as water penetration and corrosion, chloride ion erosion, alkali aggregate reaction, carbonation and steel corrosion are directly related to its own permeability. Concrete The waterproof and anti-seepage effect of the structure directly affects the safety and service life of the building structure. [0003] For a long time, there are many ways to solve the problem of concrete impermeability, but the most widely used is to lay waterproof membranes or apply waterproof coatings on the concrete surface. Water seepage in the area, the latter is easy to age and has poor durability. The above post-repair measures are all palliatives, not the root cause. ...

Claims

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Application Information

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IPC IPC(8): C04B28/06
Inventor 宫晨琛马蕊王守德芦令超程新
Owner UNIV OF JINAN
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