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Hibiscus cannabinus straw light anti-crack insulating mortar and preparation method thereof

A technology of thermal insulation mortar and kenaf, which is applied in the field of new materials, can solve the problems affecting the safety of highways and civil aviation traffic, the difficulty of comprehensive utilization, waste of straw, etc., and achieve broad market space and application prospects, good economic and social benefits, and increased Effect of large wall thermal resistance

Active Publication Date: 2019-03-19
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Kenaf is planted in large areas in Anhui, Jiangsu, Hunan and other provinces. Kenaf has the advantages of high friction coefficient and elastic modulus, high moisture absorption, high oil absorption, and heat resistance. At present, the comprehensive utilization rate of straw in my country is Only about 50%, a large amount of straw is wasted or burned on the spot, which not only causes environmental pollution, but also seriously affects the traffic safety of highways, civil aviation, etc., and is also a huge waste of resources. Its comprehensive utilization is the existing technical problem

Method used

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  • Hibiscus cannabinus straw light anti-crack insulating mortar and preparation method thereof
  • Hibiscus cannabinus straw light anti-crack insulating mortar and preparation method thereof
  • Hibiscus cannabinus straw light anti-crack insulating mortar and preparation method thereof

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Effect test

Embodiment 1

[0031] Kenaf stalk anti-crack thermal insulation mortar, said kenaf straw anti-crack thermal insulation mortar comprises the following components: Portland cement and microsilica fume form a cementitious material, wherein microsilica fume is 4%, cement is 96%, and both The sum of the weight component percentages is 100%;

[0032] In terms of cementitious material, kenaf straw fiber is 0.5%, fly ash floating beads are 2.4%, kenaf straw core is 24%; water is 89%; the mass ratio of cementitious material to sand is 1:2.

[0033] Wherein said cement is 42.5 grade ordinary Portland cement; said sand is medium sand with good particle size distribution; said microsilica fume SiO 2The content is 92%, and the fineness is 0.1-5 μm, wherein the part with a fineness less than 1 μm accounts for more than 80%; the particle size of the fly ash floating beads is 80-120 mesh; firstly, the obtained kenaf straw is crushed with a crusher Crushing, the crushed kenaf stalks are initially screened f...

Embodiment 2

[0038] Kenaf stalk anti-crack thermal insulation mortar, said kenaf straw anti-crack thermal insulation mortar comprises the following components: Portland cement and microsilica fume form a cementitious material, wherein microsilica fume is 12%, cement is 88%, and both The sum of the weight component percentages is 100%;

[0039] In terms of cementitious material, 1.5% of kenaf straw fiber, 2.4% of fly ash floating beads, 12% of kenaf straw core; 84% of water; the mass ratio of cementitious material to sand is 1:2.

[0040] Wherein said cement is 42.5 grade ordinary Portland cement; said sand is medium sand with good particle size distribution; said microsilica fume SiO 2 The content is 92%, and the fineness is 0.1-5 μm, wherein the part with a fineness less than 1 μm accounts for more than 80%; the particle size of the fly ash floating beads is 80-120 mesh; firstly, the obtained kenaf straw is crushed with a crusher Crushing, the crushed kenaf stalks are initially screened ...

Embodiment 3

[0045] Kenaf straw anti-crack thermal insulation mortar, said kenaf straw anti-crack thermal insulation mortar comprises the following components by weight: Portland cement and silica fume form a cementitious material, wherein microsilica fume is 8% and cement is 92% , the sum of the percentages by weight of the two components is 100%;

[0046] In terms of cementitious material, 1.5% of kenaf straw fiber, 1.2% of fly ash floating beads, 12% of kenaf straw core; 65% of water; the mass ratio of cementitious material to sand is 1:2.

[0047] Wherein said cement is 42.5 grade ordinary Portland cement; said sand is medium sand with good particle size distribution; said microsilica fume SiO 2 The content is 92%, and the fineness is 0.1-5 μm, wherein the part with a fineness less than 1 μm accounts for more than 80%; the particle size of the fly ash floating beads is 80-120 mesh; firstly, the obtained kenaf straw is crushed with a crusher Crushing, the crushed kenaf stalks are initi...

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Abstract

The invention belongs to the field of novel building materials and provides hibiscus cannabinus straw light anti-crack insulating mortar and a preparation method thereof. The mortar contains a gel material, sand, hibiscus cannabinus straw fibers, coal ash floating beads and hibiscus cannabinus straw cores, wherein the hibiscus cannabinus straw cores serve as a material for replacing glass beads inthe prior art, so that the heat resistance of the hibiscus cannabinus straw light anti-crack insulating mortar can be increased and the cost is lowered. The hibiscus cannabinus straw fibers replace polyvinyl alcohol fibers, so that the crack resistance and the toughness of the hibiscus cannabinus straw light anti-crack insulating mortar can be improved obviously. Compared with a treatment methodof directly adding straws into the mortar, the method of adding hibiscus cannabinus straw cores and the hibiscus cannabinus fibers into the mortar separately can make full use of the hibiscus cannabinus straws and improves the mechanical properties and the insulating property of the mortar. The hibiscus cannabinus straw light anti-crack insulating mortar is prominent in crack resistance, and can improve the wall heat resistance and reduce the heat conductivity coefficient obviously if being smeared to the wall, so that the hibiscus cannabinus straw light anti-crack insulating mortar is energy-saving, environment-friendly and waste-utilizing while a building is energy-saving. The hibiscus cannabinus straw light anti-crack insulating mortar has good environmental benefit, economical benefitand social benefit.

Description

technical field [0001] The invention belongs to the field of new materials, and provides a light-weight anti-crack heat-retaining mortar containing kenaf straw and a preparation method thereof. Background technique [0002] The production and processing industry of building materials is an energy-consuming industry. In the process of production and processing, it not only consumes energy but also pollutes the environment. Therefore, it has become a good development trend to continuously develop and promote environmental protection and energy-saving building materials in today's society. Insulation mortar is a kind of building material that uses various light materials as aggregates, cement as cement, and some modified additives to build the insulation layer of the building surface. It is environmentally friendly, pollution-free, easy to construct, and comprehensive. Low cost, high strength, good thermal performance and other advantages. [0003] At present, the thermal ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B14/062C04B14/06C04B18/248C04B18/082
Inventor 王少杰戴莉刘鑫艾仕云王浩李德华
Owner SHANDONG AGRICULTURAL UNIVERSITY
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