A thermal insulation block prepared by using plant fiber modified spoil and its preparation method

A plant fiber, thermal insulation block technology, applied in applications, ceramic products, manufacturing tools, etc., can solve the problems of large skeleton frame, low thermal insulation performance, etc., and achieve reduced collapse, good thermal stability, and light weight. Effect

Active Publication Date: 2021-03-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are various structural forms of thermal insulation blocks on the market, most of which are filled with thermal insulation materials in the cavity of the block, while the skeleton part of the block has a large weight, low thermal insulation performance, and the raw materials used are not green environmental protection materials

Method used

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  • A thermal insulation block prepared by using plant fiber modified spoil and its preparation method
  • A thermal insulation block prepared by using plant fiber modified spoil and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Collect composite construction spoil with a ratio of sandy soil and clayey soil of 3:1, and the content of impurities in the spoil is <0.1%. The spoil is dehydrated, dried, ground, and sieved to obtain spoil powder 1# with a particle size of 0.045-0.105 mm.

[0037]Select crop stalks and rice straw as plant fiber raw materials. After removing the leaves, nodes, ears and other parts of the crop straw, it is mixed with rice straw, and after dust removal, shearing and crushing, the length of the obtained fiber is controlled at 0.1-5.0mm. Then soak the above-mentioned plant fibers in a polylactic acid resin solution with a concentration of 3% and a particle size of polylactic acid resin of 1.0-2.0 μm for 40 minutes, and then vacuum-dry them at 50°C, and the polylactic acid resin forms a film on the surface of the plant fibers to form a plant. Fiber 1#, collected for later use.

[0038] In parts by weight, take 280 parts of spoil powder 1#, 90 parts of ordinary Portland ce...

Embodiment 2

[0042] Collect composite construction spoil with a ratio of sandy soil and clayey soil of 4:1, and the content of impurities in the spoil is <0.1%. The spoil is dehydrated, dried, ground, and sieved to obtain spoil powder 2# with a particle size of 0.045-0.105 mm.

[0043] Sawdust and straw are selected as plant fiber raw materials. After the two kinds of fibers are mixed, the length of the obtained fibers is controlled within 0.1-5.0 mm after dust removal, shearing and crushing. Then soak the above-mentioned plant fibers in a polylactic acid resin solution with a concentration of 3% and a particle size of polylactic acid resin of 1.0-2.0 μm for 40 minutes, and then vacuum-dry them at 50°C, and the polylactic acid resin forms a film on the surface of the plant fibers to form a plant. Fiber 2#, collected for later use.

[0044] According to parts by weight, take 300 parts of spoil powder 2#, 100 parts of ordinary Portland cement, 25 parts of fly ash, 3 parts of alkaline activ...

Embodiment 3

[0048] Collect composite construction spoil with a ratio of sandy soil and clayey soil of 3:1, and the content of impurities in the spoil is <0.1%. The spoil is dehydrated, dried, ground, and sieved to obtain spoil powder 3# with a particle size of 0.045-0.105 mm.

[0049] Sawdust and straw are selected as plant fiber raw materials. After the two kinds of fibers are mixed, the length of the obtained fibers is controlled within 0.1-5.0 mm after dust removal, shearing and crushing. Then soak the above-mentioned plant fibers in a polylactic acid resin solution with a concentration of 3% and a particle size of polylactic acid resin of 1.0-2.0 μm for 40 minutes, and then vacuum-dry them at 50°C, and the polylactic acid resin forms a film on the surface of the plant fibers to form a plant. Fiber 3#, collected for later use.

[0050] In parts by weight, take 250 parts of spoil powder 3#, 85 parts of ordinary Portland cement, 30 parts of fly ash, 4 parts of alkaline activator, 12 pa...

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Abstract

The invention relates to a thermal insulation building block prepared from plant fiber modified spoil and a preparation method of the thermal insulation building block. The thermal insulation buildingblock comprises the following raw material components in parts by weight: 80-100 parts of cement, 240-280 parts of artificial coarse aggregate, 120-140 parts of artificial fine aggregate, 25-35 partsof limestone mineral powder, 1-3 parts of desulfurized gypsum, 5-15 parts of hollow glass beads, 3-4 parts of a polycarboxylate superplasticizer, 0.5-3 parts of a hydrogen peroxide foaming agent, 0.03-0.18 parts of an excitant, 0.25-1.5 parts of a calcium stearate foam stabilizer and 40-50 parts of water. According to the thermal insulation building block provided by the invention, a technology of recycling plant fiber modified spoil to regenerate artificial aggregate is combined with a thermal insulation building block preparation technology. By preparing the artificial aggregate with certain strength and thermal insulation property and adding the cementing material, the foaming agent and other additives, the prepared thermal insulation building block has favorable mechanical propertiesand thermal properties, and has higher environmental benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to a thermal insulation block prepared by using plant fiber modified spoil and a preparation method thereof. Background technique [0002] With the acceleration of my country's urbanization process and the rapid development of the national economy, construction spoils have become an urgent problem to be solved at the same time as large-scale construction projects. Negative Effects. If you choose to transport the spoils abroad, the storage yards will not be able to meet the demand for spoil storage in terms of quantity and capacity, and the transportation costs will also cause a huge burden on the economy. Therefore, the regeneration and resource utilization of spoil is of great significance, and it has also been developed to a certain extent at this stage. For example, the Chinese patent with application number 201410615883.7 discloses a solidified ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02B28B1/52B28B1/50C04B111/40
CPCB28B1/50B28B1/525C04B28/04C04B38/02C04B2111/00017C04B2111/40C04B18/16C04B18/24C04B18/248C04B18/08C04B2103/12C04B2103/304C04B22/064C04B24/24C04B14/28C04B14/02C04B22/145C04B14/22C04B2103/302C04B22/068C04B24/085C04B22/00
Inventor 肖建庄侯逸青丁陶郝潞岑
Owner TONGJI UNIV
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