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Anti-skid cement mortar for tunnel pavement and preparation method thereof

A technology for cement mortar and tunnel, which is applied in the field of anti-slip cement mortar for tunnel pavement and its preparation, can solve the problems of durability without considering anti-slip performance, poor impact resistance, wear resistance, insufficient toughness, etc., and achieves good durability , prolong the service life, the effect of high early strength

Active Publication Date: 2015-03-25
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary cement mortar has high compressive strength, but has disadvantages such as high brittleness, insufficient toughness, and poor impact resistance and wear resistance.
Although polymer cement mortar has good flexural, compressive strength and bonding properties, when it is used for tunnel cement pavement maintenance and repair, the environmental factors of tunnel moisture and acid gas have no effect on its anti-skid performance and durability. influences

Method used

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  • Anti-skid cement mortar for tunnel pavement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Pour 28.9 parts (parts by mass, the same below) of cement and 55 parts of quartz sand (fineness modulus 2.52) into a stirring tank for manual premixing; add 3 parts of water into the mixture of cement and sand and perform mechanical stirring for 60 seconds; mix 10 parts of Pour the styrene-acrylic emulsion (38% solid content) into the stirring tank, and rinse the container containing the styrene-acrylic emulsion twice with the remaining 3 parts of water, then pour it into the reaction kettle and stir for 120s; slowly add 0.05 parts respectively Naphthalene-based water reducer, 0.02 part of organosiloxane and 0.03 part of polyacrylamide are stirred evenly to obtain an anti-skid cement mortar.

[0029] The setting time of the mortar was tested according to the "Test Regulations for Cement and Cement Concrete in Highway Engineering" (JTG E30-2005). The initial setting time was 285 minutes and the final setting time was 515 minutes. Considering the small thickness of the an...

Embodiment 2

[0032] Pour 28 parts of cement and 54.88 parts of sand into the mixing tank for manual premixing; add 2.5 parts of water into the mixture of cement and sand and perform mechanical stirring for 60 seconds; pour 12 parts of polyvinyl acetate emulsion (40% solid content) into the stirring Reactor, and rinse the remaining 2.5 parts of water twice to the container holding the polymer, pour it into the reaction kettle and stir for 120s; slowly add 0.04 parts of polycarboxylate water reducer, 0.03 parts of organosiloxane With 0.02 part of polyvinyl alcohol and 0.03 part of polyacrylamide, stir evenly to obtain a kind of anti-skid cement mortar. Its initial setting time is 265min and final setting time is 500min; the 3d flexural strength is 4.6MPa, and the compressive strength is 27.8MPa.

Embodiment 3

[0034] Pour 28.5 parts of cement and 56.39 parts of quartz sand into the mixing tank for manual premixing; add 2 parts of water into the mixture of cement and sand and perform mechanical stirring for 90s; pour 11 parts of ethylene-vinyl acetate emulsion (solid content 40%) into the stirring tank, and rinse the remaining 2 parts of water twice to the container holding the polymer, then pour it into the reaction tank and stir for 120s; slowly add 0.04 parts of polycarboxylate water reducer, 0.03 parts of silicon ether and 0.04 part of polyacrylamide, and stir evenly to obtain a kind of anti-skid cement mortar. Its initial setting time is 265min and final setting time is 505min; the 3d flexural strength is 4.9MPa, and the compressive strength is 28.8MPa.

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Abstract

The invention discloses anti-skid cement mortar for a tunnel pavement and a preparation method thereof. The anti-skid cement mortar is prepared from the following components in percentage by weight: 26-36 parts of cement, 48-58 parts of sands, 8-18 parts of polymers, 3-10 parts of water, 0.03-0.07 part of a water reducer, 0.01-0.04 part of a defoamer and 0.01-0.06 part of a stabilizer. The preparation method comprises the following steps: weighing the following raw materials in the anti-skid cement mortar in percentage by weight: cement, sand, polymers, water, a water reducer, a defoamer and a stabilizer for later use; pouring cement and sand into a stirring kettle, pre-mixing, and piling up; adding water into a cement-sand mixture pit, stirring, and then pilling the mixture up again; adding a polymer emulsion into the mixture pit, mechanically stirring and piling the mixture up; and slowly adding the water reducer, the defoamer and the stabilizer, respectively, and uniformly stirring to prepare the anti-skid cement mortar. The anti-skid cement mortar disclosed by the invention is good in peaceability and high in early strength and can be used for effectively improving the anti-skid performance of the pavement.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to an anti-skid cement mortar for tunnel pavement and a preparation method thereof. Background technique [0002] With the rapid development of the national economy and the rapid increase of comprehensive national strength, the construction of highway tunnels in my country has developed rapidly. However, under the action of driving load, the tunnel concrete pavement is easy to be polished and smoothed, and gradually loses its original anti-skid performance, resulting in a sharp decrease in the friction coefficient between the pavement and car tires. More serious traffic accidents such as sideslip or even collision occur. It not only causes huge losses to people's life and property safety, but also causes huge damage to vehicles and traffic facilities, reduces road transportation efficiency, and causes great inconvenience to passenger and cargo transportation. [0003] As th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06
Inventor 陈华鑫尹艳平况栋梁宋莉芳高盼张敏李廷
Owner CHANGAN UNIV
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