Nano material improved cement base material and application thereof in expressways

A technology of cement-based materials and nano-materials, applied in the field of new materials, can solve the problems of mortar durability hazards, increased material costs, high additive content, etc., and achieve the effect of improving anti-seepage effect and corrosion resistance

Active Publication Date: 2019-02-15
张园
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mortar has the advantages of good fluidity, high early strength, no shrinkage in the later stage, and good expansion performance. However, the cost of the expansion agent and sand material used in the mortar material is expensive, and the amount of additive components used is high, which greatly increases Material cost, and contains chloride ions, which is harmful to the durability of mortar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A nano-material modified cement-based material, consisting of the following components by weight percentage:

[0037] Portland cement 42%

[0038] Bonnet 1.5%

[0039] Nano material modifier 0.03%

[0040] Water reducer 0.7%

[0041] Early strength agent 0.4%

[0042] Expanding agent 3.5%

[0043] Latex powder 7%

[0044] High-purity aluminum powder 0.3%

[0045] Methyl hydroxypropyl cellulose ether 0.15%

[0046] aggregate balance.

[0047] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0048] The nanomaterial modifier is boron-doped graphene; in the boron-doped graphene, the doping amount of boron is 1.25%.

[0049] The water reducer is naphthalenesulfonate water reducer; the early strength agent is calcium formate, and the expansion agent is ZY type expansion agent.

[0050] The aluminum content in the high-purity aluminum powder is higher than 99.9%.

[0051] The aggregate is fine sand with a particle s...

Embodiment 2

[0058] A nano-material modified cement-based material, consisting of the following components by weight percentage:

[0059] Portland cement 50%

[0060] Bonnet 1%

[0061] Nano material modifier 0.05%

[0062] Water reducer 0.5%

[0063] Early strength agent 0.5%

[0064] Bulking agent 2%

[0065] Latex powder 8%

[0066] High-purity aluminum powder 0.2%

[0067] Methyl hydroxypropyl cellulose ether 0.2%

[0068] aggregate balance.

[0069] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0070] The nanomaterial modifier is boron-doped graphene; in the boron-doped graphene, the doping amount of boron is 1%.

[0071] The water reducer is naphthalenesulfonate water reducer; the early strength agent is calcium formate, and the expansion agent is ZY type expansion agent.

[0072] The aluminum content in the high-purity aluminum powder is higher than 99.9%.

[0073] The aggregate is fine sand with a particle size of 1-3...

Embodiment 3

[0080] A nano-material modified cement-based material, consisting of the following components by weight percentage:

[0081] Portland cement 35%

[0082] Bonnet 2%

[0083] Nano material modifier 0.02%

[0084] Water reducer 0.8%

[0085] Early strength agent 0.2%

[0086] Bulking agent 4%

[0087] Latex powder 5%

[0088] High-purity aluminum powder 0.5%

[0089] Methyl hydroxypropyl cellulose ether 0.1%

[0090] aggregate balance.

[0091] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0092] The nanomaterial modifier is boron-doped graphene; in the boron-doped graphene, the doping amount of boron is 1.5%.

[0093] The water reducer is naphthalenesulfonate water reducer; the early strength agent is calcium formate, and the expansion agent is ZY type expansion agent.

[0094] The aluminum content in the high-purity aluminum powder is higher than 99.9%.

[0095] The aggregate is fine sand with a particle size of 1...

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Abstract

The invention discloses a nano material improved cement base material which consists of the following components in percentage by weight: 35-50% of Portland cement, 1-2% of Bonite, 0.02-0.05% of a nano material modifier, 0.5-0.8% of a water reduction agent, 0.2-0.5% of an early strength agent, 2-4% of an expanding agent, 5-8% of latex powder, 0.2-0.5% of high-purity aluminum powder, 0.1-0.2% of methyl hydroxypropyl cellulose ether and the balance of aggregate. Due to adoption of the novel synthetic dense fire-resistant aggregate Bonite in the material, the corrosion resistance of the cement base material can be improved, and to further improve an anti-seepage effect on chlorine ions, a small amount of a nano material modifier, namely boron doped graphene, is also added; the nano material improved cement base material disclosed by the invention can be used as a bridge bracket grouting material or a repairing material used in expressways.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a nanomaterial-improved cement-based material and its application in highways. Background technique [0002] In recent years, China's expressways have developed rapidly. In order to improve the quality and service life, it is required to use early-strength inorganic mortar materials with better durability in the support anchorage construction. [0003] However, most of the bridge bearings of the expressway are below the water level. Due to the erosion of water flow, coupled with the influence of other environmental factors such as geological and hydrological changes, and the vibration generated by vehicles, the concrete structure will be damaged, especially due to the expansion effect. Part of the road surface The bulge will not only increase the cost of the road surface during repair, but also cause very heavy pressure on traffic. [0004] Chinese invention patent CN10148...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2111/70C04B2103/63C04B14/024C04B24/20C04B24/04C04B2103/0068C04B24/24C04B22/04C04B14/06C04B24/383
Inventor 张园崔冬艳尤富春聂旭翠冯浩锐范晓涛苌浩任海杰王月韩硕
Owner 张园
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