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Bridge bearing mortar and its production method

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: 2016-08-17
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 its production method

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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 present invention involves a bridge support mortar and its production methods, which are characterized by the following raw materials that include the following weights: of which, the grade with quartz sand 45 to 60 copies, 42.5 aluminum aluminum cement cement 30 to 40 parts, 42.5 universal universalSilicon cement 5 to 15 parts, 1 ~ 10 parts of U -type expansion agents, 0.1 to 1 part of water reduction agent, 0.1 ~ 0.5 copies of water retention agent, 0.01 to 0.1 copies of early strong agents0.01 ~ 0.03.The bridge support of the present invention has low cost, excellent performance, and stable quality. It has high moisture flow, short -end condensate time, rapid development, and good micro -expansion characteristics. It can be widely used for high -speed railways and highways and highways., Mortar and production methods of bridge branches of traffic bridges.

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 Patents(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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