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A flame-retardant heat-insulating mortar mixed with corncob core and its preparation method

A technology of corncob cob and thermal insulation mortar, which is applied in the field of building materials, can solve the problems of easily broken and broken vitrified microbeads, reduced thermal insulation performance, poor fire performance, etc., and achieves simple and fast construction, improved construction performance, good economical and The effect of social benefit

Inactive Publication Date: 2015-12-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Vitrified microbead inorganic thermal insulation mortar, good fire resistance, A-class fireproof and non-combustible, but often due to vitrified microbeads are easy to break and break, resulting in reduced thermal insulation performance
The cost of EPS particle insulation mortar is reduced, but its fire performance is not good, and its safety performance is relatively poor, which limits its application in the external wall insulation system and the wall internal insulation system
[0004] my country is a large agricultural country, which produces a large amount of crop waste every year. Among them, the annual output of corn cobs reaches 70 million tons, accounting for about 10% of the straw-like agricultural solid waste. Although corn cobs are partially obtained in food processing, feed, etc. Applied, but most still to be applied

Method used

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  • A flame-retardant heat-insulating mortar mixed with corncob core and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0045]Example 1: A flame-retardant thermal insulation mortar mixed with corn cob cores, its components and ratio (weight percent) are 100 grade 32.5 ordinary Portland cement, 15 slag fine powder, 12 desulfurized gypsum, and 8 calcium hydroxide , corn cob core 55, glass beads 45, EVA latex powder 3.5, air-entraining agent (sodium lauryl sulfate) 0.29, hydroxypropyl starch ether 1.7. Among them: corn cob cores are broken into particles below 5mm, soaked in calcium hydroxide saturated solution for 2 hours, dried, and then passed through 2.5mm, 1.25mm and 0.16mm sieves to obtain particle sizes ranging from 2.5mm-5.0mm, 1.25mm Four kinds of corn cobs of mm-2.5mm, 0.16mm-1.25mm and 0-0.16mm; corn cobs are prepared according to the weight percentage of each particle size distribution range: 2.5mm-5.0mm is 40%, 1.25mm-2.5 mm is 40%, 0.16mm-1.25mm is 15%, 0-0.16mm is 5%; after weighing the above materials, put them into the mixer and mix them evenly. Add water according to 80% of the ...

Embodiment 2

[0046] Example 2: A flame-retardant thermal insulation mortar mixed with corn cob cores, its components and proportions (percentage by weight) are 100 grade 32.5 ordinary Portland cement, 28 slag fine powder, 18 desulfurized gypsum, and 12 calcium hydroxide , corn cob core 45, vitrified microspheres 55, EVA latex powder 4.2, air-entraining agent (sodium lauryl sulfate) 0.23, hydroxypropyl starch ether 1.5. Among them: corn cob cores are broken into particles below 5mm, soaked in calcium hydroxide saturated solution for 2 hours, dried, and then passed through 2.5mm, 1.25mm and 0.16mm sieves to obtain particle sizes ranging from 2.5mm-5.0mm, 1.25mm Four kinds of corn cobs of mm-2.5mm, 0.16mm-1.25mm and 0-0.16mm; corn cobs are prepared according to the weight percentage of each particle size distribution range: 2.5mm-5.0mm is 40%, 1.25mm-2.5 mm is 40%, 0.16mm-1.25mm is 15%, 0-0.16mm is 5%; after weighing the above materials, put them into the mixer and mix them evenly. Add water...

Embodiment 3

[0047] Example 3: A flame-retardant thermal insulation mortar mixed with corn cob cores, its components and proportions (percentage by weight) are 42.5 grade ordinary Portland cement 100, slag fine powder 32, desulfurized gypsum 24, calcium hydroxide 14 , corn cob core 45, vitrified microspheres 40, EVA latex powder 4.2, air-entraining agent (sodium lauryl sulfate) 0.19, hydroxypropyl starch ether 2.7. Among them: corn cob cores are broken into particles below 5mm, soaked in calcium hydroxide saturated solution for 2 hours, dried, and then passed through 2.5mm, 1.25mm and 0.16mm sieves to obtain particle sizes ranging from 2.5mm-5.0mm, 1.25mm Four kinds of corn cobs of mm-2.5mm, 0.16mm-1.25mm and 0-0.16mm; corn cobs are prepared according to the weight percentage of each particle size distribution range: 2.5mm-5.0mm is 40%, 1.25mm-2.5 mm is 40%, 0.16mm-1.25mm is 15%, 0-0.16mm is 5%; after weighing the above materials, put them into the mixer and mix them evenly. Add water acc...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to flame-retardant thermal insulation mortar doped with cob cores and a preparation method thereof. The flame-retardant thermal insulation mortar doped with the cob cores is prepared from ordinary portland cement, superfine slag powder, desulphurization gypsum, calcium hydroxide, glass beads, the cob cores, EVA (ethylene-vinyl acetate) emulsion powder, an air entraining agent and hydroxypropyl starch ether and the like, wherein the cob cores serve as main lightweight aggregates. The flame-retardant thermal insulation mortar is prepared by fully utilizing the agricultural waste cob cores and other solid wastes, low in production cost, simple and fast in construction, safe, durable and non-combustible and has good construction performance and mechanical property, excellent heat preservation property and fireproof performance, A-grade fire resistance and good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a flame-retardant thermal insulation mortar mixed with corn cob cores and a preparation method thereof. Background technique [0002] With the development of building energy conservation in my country, the application of external wall thermal insulation system has become one of the main technologies to achieve building energy conservation. Buildings are extended to rural buildings, promoting the development of energy-saving buildings in urban and rural areas, and put forward the development and promotion of new energy-saving building materials. Building energy conservation urgently needs safe, environmentally friendly and efficient thermal insulation materials. Insulation mortar is a kind of powder insulation material obtained by mixing light aggregate, cementitious material and chemical additives. Compared with various insulation boards, it has the advanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/30C04B14/22
CPCY02W30/91
Inventor 张国防王培铭丁意赵建斌徐玲琳李好新
Owner TONGJI UNIV
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