Pyrolysis carbon black modified cement mortar and preparation method thereof

A technology of cement mortar and carbon black, which is applied in the field of civil engineering, can solve problems such as aging and damage, and achieve the effect of delaying the corrosion of steel bars, improving bonding ability and cohesion, and preventing cracking

Inactive Publication Date: 2019-11-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing cement mortar technology is used in the construction industry,

Method used

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  • Pyrolysis carbon black modified cement mortar and preparation method thereof
  • Pyrolysis carbon black modified cement mortar and preparation method thereof
  • Pyrolysis carbon black modified cement mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025]

[0026] Add the above-mentioned proportions according to the technical scheme.

[0027] The pyrolysis carbon black is ground into a fine powder with a grinder with a particle size of 3-40um and a specific surface area of ​​0.2-6m 2 / g.

[0028] Further, in the above technical solution, the Portland cement strength grade is C35 or C40.

[0029] Further, in the above technical solution, the specification of the PP fiber is 3-12 mm.

[0030] Further, in the above technical scheme, the specific surface area of ​​the fly ash is 520~760m 2 / kg:.

[0031] Further, in the above technical solution, the aqueous dispersant is HPMA.

[0032] Further, in the above technical solution, the water reducing agent is a polycarboxylic acid water reducing agent (powder).

[0033] Further, in the above technical solution, the expansion agent is calcium sulfoaluminate expansion agent.

[0034] Further, in the above technical scheme, the defoamer is a special defoamer for cement mortar. ...

Example Embodiment

[0035] Example 2

[0036]

[0037] Add the above-mentioned proportions according to the technical scheme.

[0038] The pyrolysis carbon black is ground into a fine powder with a grinder with a particle size of 3-40um and a specific surface area of ​​0.2-6m 2 / g.

[0039] Further, in the above technical solution, the Portland cement strength grade is C35 or C40.

[0040] Further, in the above technical solution, the specification of the PP fiber is 3-12 mm.

[0041] Further, in the above technical scheme, the specific surface area of ​​the fly ash is 520~760m 2 / kg:.

[0042] Further, in the above technical solution, the aqueous dispersant is HPMA.

[0043] Further, in the above technical solution, the water reducing agent is a polycarboxylic acid water reducing agent (powder).

[0044] Further, in the above technical solution, the expansion agent is calcium sulfoaluminate expansion agent.

[0045] Further, in the above technical scheme, the defoamer is a special defoamer for cement mortar. ...

Example Embodiment

[0046] Example 3

[0047]

[0048] Add the above-mentioned proportions according to the technical scheme.

[0049] The pyrolysis carbon black is ground into a fine powder with a grinder with a particle size of 3-40um and a specific surface area of ​​0.2-6m 2 / g.

[0050] Further, in the above technical solution, the Portland cement strength grade is C35 or C40.

[0051] Further, in the above technical solution, the specification of the PP fiber is 3-12 mm.

[0052] Further, in the above technical scheme, the specific surface area of ​​the fly ash is 520~760m 2 / kg:.

[0053] Further, in the above technical solution, the aqueous dispersant is HPMA.

[0054] Further, in the above technical solution, the water reducing agent is a polycarboxylic acid water reducing agent (powder).

[0055] Further, in the above technical solution, the expansion agent is calcium sulfoaluminate expansion agent.

[0056] Further, in the above technical scheme, the defoamer is a special defoamer for cement mortar. ...

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Abstract

The invention relates to a pyrolysis carbon black modified cement mortar and a preparation method thereof. According to the invention, pyrolysis carbon black is added into a cement raw material, and the ultraviolet aging resistance of cement is improved by utilizing the light stability and ultraviolet aging resistance of the pyrolysis carbon black; redispersible latex powder is added into the mortar, so the mortar can be effectively improved inbonding capacity and cohesion, has enhanced bending resistance, tensile resistance and freeze-thaw stability, and is effectively prevented from cracking; the cement disclosed by the invention contains PP fibers, so the tensile strength, the toughness and the dry crack resistance of the cement can be enhanced, and microcracks caused by shrinkage, dryshrinkage and temperature changes can be effectively controlled; and meanwhile, the cement disclosed by the invention has good compatibility with a concrete structure, and has wide research and application prospects in the civil construction industry and the like.

Description

technical field [0001] The invention relates to cracking carbon black modified cement and a preparation method thereof, which are used in civil construction projects. Background technique [0002] The cement industry and cement products are the pillar industries and pillar products of the building materials industry, and it is difficult to find their substitutes in a short period of time. For a long period of time in the future, cement will still be the main building material of human society. Cement is a kind of cementitious material with strong bonding ability. Its bonding ability and durability of bonding ability cannot be achieved by other chemical cementitious materials. Moreover, cement is more environmentally friendly, low in cost, and simple in process. When the existing cement mortar technology is used in the construction industry, problems such as aging and damage are prone to occur as the use time becomes longer. The pyrolysis carbon black has strong light stabi...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C04B111/20
CPCC04B28/04C04B2111/20C04B16/0633C04B14/068C04B18/08C04B2103/302C04B22/142C04B2103/50C04B24/2623C04B24/2664C04B14/022
Inventor 林广义于博全刘守一王宏刘扶民胡亚菲
Owner QINGDAO UNIV OF SCI & TECH
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