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A kind of composite graphene high-strength construction waste cement mortar and preparation method thereof

A technology of composite graphene and construction waste, applied in the field of composite graphene high-strength construction waste cement mortar and its preparation, can solve the problems of high apparent density of components, high water absorption, large crushing index, etc., and achieves excellent environmental protection performance, The effect of good weather resistance and low comprehensive cost

Active Publication Date: 2022-01-11
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Today, the continuously increasing output of construction waste has reached 30% to 40% of urban waste, while the utilization rate of construction waste in my country is less than 5%.
There are many unavoidable shortcomings in recycled fine aggregate, such as the uncertainty of composition and large apparent density, high bulk density, high water absorption, large crushing index, and a large number of microcracks on the surface, which will cause recycled fine aggregate Difficult to use in the concrete industry

Method used

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  • A kind of composite graphene high-strength construction waste cement mortar and preparation method thereof
  • A kind of composite graphene high-strength construction waste cement mortar and preparation method thereof
  • A kind of composite graphene high-strength construction waste cement mortar and preparation method thereof

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Embodiment 1

[0033] The invention adopts construction waste as a raw material, crushes it with a roller crusher, and screens fine particles between 10 mesh and 60 mesh as regenerated fine aggregate, so as to realize resource recycling and turn waste into treasure. The physical properties of the obtained recycled fine aggregate are listed in Table 1.

[0034] Table 1

[0035]

[0036] The physical and chemical properties of graphene oxide GO used in this example are shown in Table 2.

[0037] Table 2

[0038]

[0039] The proportioning of each raw material of the present embodiment composite graphene high-strength construction waste cement mortar is by weight:

[0040] 12 parts of mixing water;

[0041] 22 parts of 42.5 grade ordinary Portland cement;

[0042] 19.8 parts of recycled fine aggregate;

[0043] 46.2 parts of standard sand;

[0044] Graphene oxide is 0.02% of the total amount of cement;

[0045] The polycarboxylate water reducer is 0.02% of the total amount of cemen...

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Abstract

The invention discloses a composite graphene high-strength construction waste cement mortar and a preparation method thereof. The construction waste and standard sand are mixed as an aggregate, graphene oxide is used as a modifier, and polycarboxylate water reducer, Made of cement and water. The performance index of the cement mortar gained in the present invention satisfies: 28 days standard compressive strength 57.6MPa, flexural strength 9.03MPa (according to GB / T17617-1999 and JGJ / T70-2009 test); Less than 5% (tested according to GB / T50476‑2008); Cl in the product ‑ The content is 0.0067%, I Ra =0.08, I r =0.15 (tested according to GB6566‑2010).

Description

technical field [0001] The invention belongs to the field of new environment-friendly building materials, and in particular relates to a composite graphene high-strength construction waste cement mortar and a preparation method thereof. Background technique [0002] The demand for building materials increases due to urbanization, and natural resources are facing a shortage. With the deepening of mining depth, excavation of mountains and rocks leads to an increase in the incidence of accidents, which seriously affects the health of workers and the smooth progress of mining work. As the process of urbanization continues to accelerate, the demolition of old buildings, the renovation of houses and the construction of new buildings will generate a large amount of construction waste. Today, the continuously increasing output of construction waste has reached 30% to 40% of urban waste, while the utilization rate of construction waste in my country is less than 5%. If a large amoun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/16C04B22/02C04B111/20
CPCC04B28/04C04B2201/50C04B2201/52C04B2111/20C04B2111/29C04B18/16C04B14/06C04B22/02C04B2103/302Y02W30/91
Inventor 徐子芳桂灿戴彦陈奔王一凡
Owner ANHUI UNIV OF SCI & TECH
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