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High-ductility thermal insulation mortar

A thermal insulation mortar, high ductility technology, applied in the field of building materials to achieve the effects of high mechanical properties, high deformation properties, and high thermal insulation properties

Active Publication Date: 2019-10-18
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the conflicting thermal insulation performance, deformation performance and mechanical performance of traditional thermal insulation materials, the present invention provides a high-temperature thermal insulation material with low thermal conductivity, low dry density, high ductility, high compressive strength and high bonding capacity. Ductile insulation mortar

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The material composition ratio is shown in Table 1:

[0053] Table 1 Mixing ratio of high ductility thermal insulation mortar materials (mass parts)

[0054]

[0055] The cement is P·O 42.5 ordinary Portland cement; the apparent density of high-strength microbeads is 650kg / m 3 , bulk density 375kg / m 3 , volume average diameter D(4,3) 200μm, compressive strength 150MPa, thermal conductivity 0.06W / (m K); fine aggregate is river sand, fineness modulus 2.6, maximum particle size 5mm; acrylate copolymer emulsion Condensation concentration 52g / L, solid content 40%; water is drinking tap water; water reducing agent is polycarboxylate high-performance water reducing agent, water reducing rate is 25%; fiber is polyvinyl alcohol fiber, equivalent diameter 40μm, elastic modulus 39GPa, length 12mm.

[0056] The rotating speed of the high-speed stirring is 600 rpm, and the stirring time is 3 minutes.

[0057] The fluctuation range of the dry density of the three parts of the ...

Embodiment 2

[0059] The material composition ratio is shown in Table 2:

[0060] Table 2 Mixing ratio of high ductility thermal insulation mortar materials (mass parts)

[0061]

[0062] The cement is P MH 42.5 medium heat Portland cement; silica fume SiO 2 The content is 95%; the apparent density of high-strength microbeads is 650kg / m 3 , bulk density 375kg / m 3 , volume average diameter D(4,3) 200μm, compressive strength 150MPa, thermal conductivity 0.06W / (m K); fine aggregate is quartz sand, fineness modulus 3.0, maximum particle size 5mm; acrylate copolymer emulsion Condensation concentration 52g / L, solid content 40%; water is drinking tap water; water reducing agent is polycarboxylate high-performance water reducing agent, water reducing rate is 30%; fiber is polyvinyl alcohol fiber, equivalent diameter 40μm, elastic modulus 39GPa, length 6mm.

[0063] The rotating speed of the high-speed stirring is 650 rpm, and the stirring time is 4 minutes.

[0064] The fluctuation range of...

Embodiment 3

[0066] The material composition ratio is shown in Table 3:

[0067] Table 3 Mixing ratio of high ductility thermal insulation mortar materials (mass parts)

[0068]

[0069] The cement is P LH 42.5 low-heat Portland cement; S75 grade slag; high-strength micro-beads with an apparent density of 650kg / m 3 , bulk density 375kg / m 3 , volume average diameter D(4,3) 200μm, compressive strength 150MPa, thermal conductivity 0.06W / (m K); fine aggregate is tailings, fineness modulus 2.3, maximum particle size 5mm; acrylate copolymer emulsion Condensation concentration 52g / L, solid content 40%; water is drinking tap water; water reducing agent is polycarboxylate high-performance water reducing agent, water reducing rate is 30%; fiber is polyvinyl alcohol fiber, equivalent diameter 20μm, elastic modulus 39GPa, length 12mm.

[0070] The rotating speed of the high-speed stirring is 700 rpm, and the stirring time is 5 minutes.

[0071] The fluctuation range of the dry density of the fo...

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Abstract

The invention discloses high-ductility thermal insulation mortar. The high-ductility thermal insulation mortar is prepared from the following components in parts by weight: 20-100 parts of cement, 0-80 parts of a mineral admixture, 5-40 parts of high-strength microbeads, 0-35 parts of aggregate, 10-50 parts of an acrylate copolymer emulsion, 5-30 parts of water, 1-1.5 parts of a water reducer, and0.75-6 parts of fibers. An air entraining material or prefabricated bubbles do not need to be added, and the bubble content and dry density of the thermal insulation mortar are adjusted by adjustingthe rotating speed and stirring time of a stirrer; the prepared high-ductility thermal insulation mortar is small in dry density fluctuation amplitude, the high-strength microbeads are evenly distributed and do not float, the deviation of the actually-measured air content and the designed air content of the mixture is small, and the dispersion coefficient of the fibers is high; the mortar is highin ductility, high in deformation capacity, low in thermal conductivity coefficient, high in compressive strength and high in bonding strength with a base body; a preparation process is simple and convenient, and the raw materials are wide in source; and the high-ductility thermal insulation mortar disclosed by the invention can be applied to thermal insulation of wall bodies and roofs, thermal insulation of the surfaces of concrete dams in severe cold regions and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-ductility thermal insulation mortar and a preparation process thereof. Background technique [0002] The thermal insulation measures for building exterior walls are to reduce the heat dissipation from the interior of the building to the outside or the heat from the exterior of the building to the interior, which plays an important role in creating a livable indoor environment and saving energy. The performance improvement of wall insulation materials is an important link in the development of building energy-saving technology. In the construction of water conservancy and hydropower projects, in order to reduce the temperature difference and temperature gradient between the inside and outside of the large-volume concrete of the power station dam, and reduce the risk of cracking of the large-volume concrete, the surface of the dam body concrete during ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/10C04B111/28
CPCC04B28/04C04B38/10C04B2111/28C04B2201/20C04B2201/32C04B2201/50C04B24/2641C04B14/04C04B14/068C04B2103/302C04B16/0641C04B18/146C04B14/06C04B18/141C04B18/12
Inventor 陈波郭丽萍白银宁逢伟张丰吕乐乐
Owner NANJING HYDRAULIC RES INST
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