Heat-resistant cement-based grouting material and preparation method thereof

A grouting material and cement-based technology, applied in the field of building materials, can solve the problems of large aggregate particle size, inapplicability to ordinary grouting projects, and increase material preparation processes, etc., to achieve low porosity, improve volume stability, and reduce volume changes Effect

Active Publication Date: 2021-07-30
BEIJING NEW VISION BUILDING CONSTR TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the slag and self-made water reduction used in this document need to be pretreated or prefabricated, which increases the preparation process of the material, and the particle size of the aggregate used is also large, which is not suitable for ordinary grouting projects.

Method used

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  • Heat-resistant cement-based grouting material and preparation method thereof
  • Heat-resistant cement-based grouting material and preparation method thereof
  • Heat-resistant cement-based grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] CA50-I type aluminate cement 420kg, graded coke gem 490kg, micro silica fume 21kg, finely ground slag powder 48kg, polycarboxylate high-performance water reducer 4.7kg, polyether defoamer 0.3kg, modified bentonite 1kg , molecular sieve 0.2kg, UEA expansion agent 5.5kg, steel fiber 7kg, basalt fiber 2.3kg. Put the above raw materials into a gravity-free mixer and stir for 5 minutes, add 12.5% ​​water after leaving the machine, and stir for 5 minutes to obtain the heat-resistant cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 1.

[0034] Table 1 Example 1 grout physical properties

[0035]

[0036]

[0037] The initial fluidity and 30min retention value of the grouting material prepared in this example are both greater than 320mm, showing good fluidity; the 28d compressive strength reaches 121.6MPa, which is high strength; after 20 thermal sh...

Embodiment 2

[0039] P·O4 2.5 Ordinary Portland Cement 390kg, Graded Quartz Sand 510kg, Microsilica Fume 31kg, Ground Slag Powder 50kg, Polycarboxylate High Performance Water Reducer 3.4kg, Organosiloxane Defoamer 0.3kg, Cellulose ether 0.3kg, molecular sieve 0.2kg, UEA expansion agent 11.8kg, steel fiber 3kg. Put the above raw materials into a gravity-free mixer and stir for 5 minutes, add 12.5% ​​water after leaving the machine, and stir for 3 minutes to obtain the heat-resistant cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 2.

[0040] Table 2 embodiment 2 grout physical properties

[0041]

[0042] The initial fluidity and 30min retention value of the grouting material prepared in this example are both greater than 320mm, showing good fluidity; the 28d compressive strength reaches 109.6MPa, which is high in strength; after 20 thermal shocks at 300°C, the sur...

Embodiment 3

[0044] P·S·A42.5 slag portland cement 420kg, graded basalt sand 470kg, microsilica fume 17.5kg, finely ground fly ash 70kg, polycarboxylate high-performance water reducer 4.5kg, organosiloxane defoaming Agent 0.5kg, cellulose ether 0.5kg, activated carbon 0.3kg, calcium oxide expansion agent 11.7kg, steel fiber 3.5kg, basalt fiber 1.5kg. Put the above raw materials into a gravity-free mixer and stir for 5 minutes, add 13% water after leaving the machine, and stir for 4 minutes to obtain the heat-resistant cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 3.

[0045] Table 3 embodiment 3 grout physical properties

[0046]

[0047] The initial fluidity and 30min fluidity retention value of the grout prepared in this example are both greater than 310mm, indicating good fluidity; the 28d compressive strength reaches 113.4MPa, which is high strength; after ...

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Abstract

The invention belongs to the field of building materials, and specifically discloses a heat-resistant cement-based grouting material and a preparation method thereof. The heat-resistant cement-based grouting material is calculated by weight percentage, and its raw material composition is as follows: cement 36%-48%, aggregate 45%-60%, mineral admixture 5%-12%, water reducing agent 0.3%- 0.6%, defoamer 0.01% ~ 0.08%, stabilizer 0.01% ~ 0.1%, expansion agent 0.5% ~ 3.5%, fiber 0.1% ~ 2%, and water 11% ~ 15%, and remove all water The sum of the components is 100%. The heat-resistant cement-based grouting material of the invention has the advantages of heat resistance, high fluidity, high strength, micro-expansion, self-compacting and the like. The heat-resistant cement-based grouting material of the present invention can be applied to the equipment foundation grouting project with a service temperature of 200-600°C and heat-resistant requirements.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to a heat-resistant cement-based grouting material, which can be applied to foundation transformation or secondary construction with heat resistance requirements of 200-600°C in metallurgy, petroleum, nuclear power, etc. Secondary grouting project, the present invention also relates to the preparation method of the heat-resistant cement-based grouting material. Background technique [0002] Cement-based grouting materials are mainly used in grouting projects such as beam-column joints, equipment bases, bridge supports, crane tracks, steel structure column feet, and anchor bolts. The maximum operating temperature of ordinary cement-based grouting materials is 200°C. When the temperature continues to rise, the cement paste in ordinary cement-based grouting materials will lose water, resulting in increased porosity and reduced strength; bone in ordinary cement-base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B28/04C04B28/08C04B111/20C04B111/70
CPCC04B28/04C04B28/06C04B28/08C04B2111/2084C04B2111/70C04B2201/50C04B14/106C04B18/141C04B18/146C04B14/104C04B24/32C04B14/48C04B14/46C04B2103/302C04B2103/0068C04B14/06C04B24/42C04B24/383C04B18/08C04B14/14C04B14/022C04B22/064
Inventor 宋涛文韩宇栋张剑唐勋海薛乃彦邓宽郑旗王永焕李晓东
Owner BEIJING NEW VISION BUILDING CONSTR TECH
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