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Bridge bearing mortar and production method thereof

A bridge support mortar and quartz sand technology, which is applied in the field of bridge support mortar, can solve the problems of low strength stability and durability, failure to develop strength, and inability to retard setting in the later stage, so as to achieve early expansion stability and reduce The effect of the initial and final setting time interval and good self-leveling characteristics

Inactive Publication Date: 2015-02-25
GUANGXI NANNING BAIRUITONG SYNTHESIS BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few relevant research reports on mortars that can simultaneously take into account high fluidity, super early strength, micro expansion, late strength stability and durability
Moreover, in the production and construction application of support mortar, due to the characteristics of rapid hardening cement, most of them have defects such as excessive retardation, insufficient strength development, or failure to retard, and fluidity retention time less than 30 minutes.

Method used

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  • Bridge bearing mortar and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Raw material and weight:

[0030] 45 parts of graded quartz sand, 40 parts of 42.5 sulfoaluminate cement, 15 parts of 42.5 ordinary silicon cement, 10 parts of U-shaped expansion agent, 1 part of water reducing agent, 0.5 part of water retention agent, 0.1 part of early strength agent, retarder 1 part, 0.03 parts of defoamer:

[0031] The water reducer is a high-performance polycarboxylate water reducer with a polyester structure; the U-shaped expansion agent includes anhydrous calcium sulfoaluminate, alumite, gypsum and surfactants; the water retention Agents include sodium bentonite and low-viscosity hydroxypropyl methylcellulose; the above-mentioned accelerators include calcium formate, ferric sulfate, calcium chloride, bentonite, triethanolamine, citric acid; the retarder includes molasses , borax, sodium gluconate and aluminum sulfate; the defoamer is organic silicon, isooctyl alcohol and diisobutyl carbinol.

[0032] (2) Production

[0033] After weighing t...

Embodiment 2

[0035] (1) Raw material and weight:

[0036] 50 parts of graded quartz sand, 35 parts of 42.5 sulfoaluminate cement, 10 parts of 42.5 ordinary silicon cement, 4 parts of U-shaped expansion agent, 0.5 part of water reducing agent, 0.2 part of water retaining agent, 0.05 part of early strength agent, retarder 0.5 parts, 0.02 parts of defoamer:

[0037]The water reducer is a high-performance polycarboxylate water reducer with a polyether structure; the U-shaped expansion agent includes anhydrous calcium sulfoaluminate, alunite, gypsum and surfactants; the water retention Agents include sodium bentonite and low-viscosity hydroxypropyl methylcellulose; the above-mentioned accelerators include calcium formate, ferric sulfate, calcium chloride, bentonite, triethanolamine, citric acid; the retarder includes molasses , borax, sodium gluconate and aluminum sulfate; the defoamer is organic silicon and dipalmitoyl ethylenediamine.

[0038] (2) Production

[0039] After weighing the gra...

Embodiment 3

[0041] (1) Raw material and weight:

[0042] 55 parts of graded quartz sand, 38 parts of 42.5 sulfoaluminate cement, 12 parts of 42.5 ordinary silicon cement, 8 parts of U-shaped expansion agent, 0.8 part of water reducing agent, 0.4 part of water retaining agent, 0.08 part of early strength agent, retarder 0.8 parts, 0.02 parts of defoamer:

[0043] The water reducer is a high-performance polycarboxylate water reducer with a polyester structure; the U-shaped expansion agent includes anhydrous calcium sulfoaluminate, alumite, gypsum and surfactants; the water retention Agents include sodium bentonite and low-viscosity hydroxypropyl methylcellulose; the above-mentioned accelerators include calcium formate, ferric sulfate, calcium chloride, bentonite, triethanolamine, citric acid; the retarder includes molasses , borax, sodium gluconate and aluminum sulfate; the defoamer is organic silicon, isooctyl alcohol, diisobutyl carbinol and distearyl ethylenediamine.

[0044] (2) Produ...

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Abstract

The invention relates to a bridge bearing mortar and a production method thereof. The invention is characterized in that the bridge bearing mortar is prepared from the following raw materials in parts by weight: 45-60 parts of graded quartz sand, 30-40 parts of 42.5 sulfoaluminate cement, 5-15 parts of 42.5 Portland cement, 1-10 parts of U-shaped expanding agent, 0.1-1 part of water reducing agent, 0.1-0.5 part of water retention agent, 0.01-0.1 part of early-strength admixture, 0.2-1 part of retarder and 0.01-0.03 part of defoaming agent. The bridge bearing mortar has the characteristics of low cost, excellent performance, stable quality, high fluidity, short initial and final setting time, quick strength development and favorable micro-expansion, and can be widely used in the bridge bearing mortar for high-speed railways, highways, traffic bridges and other bridges and a production method thereof.

Description

technical field [0001] The invention belongs to the processing field of building materials, and in particular relates to a mortar widely used in bridge supports of high-speed railways, expressways, traffic bridges and the like and a production method thereof. Background technique [0002] In recent years, my country's high-speed railway construction is progressing at a speed that attracts the attention of the world, especially the mileage of passenger dedicated lines with a speed exceeding 350km / h continues to increase. The construction of passenger dedicated lines puts forward higher requirements for the quality and service life of construction projects. In the bridge construction design of railway passenger dedicated line, in order to improve the quality and service life, it is required to use early-strength mortar materials with better durability in the grouting construction of bridge supports. [0003] The bearing is an important part of the bridge structure, which direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B24/12C04B24/32C04B24/16C04B103/12
Inventor 覃乃舟
Owner GUANGXI NANNING BAIRUITONG SYNTHESIS BUILDING MATERIALS TECH
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