Insulating dry powder mortar

A technology of thermal insulation mortar and dry powder, which is applied in the field of building materials and chemistry, which can solve the problems of troublesome transportation, easy cracking, and large difference in thermal conductivity, etc., and achieve the effects of convenient storage and transportation, good construction performance, and stable physical properties

Inactive Publication Date: 2009-09-09
CHANGSHA YUANPENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the external wall insulation system in China mainly includes thermal insulation boards and thermal insulation mortars. Since thermal insulation boards are difficult to be used in the thermal insulation and energy-saving renovation of old houses, the construction is difficult and the cost is high, in the short term it should be widely used in the thermal insulation and energy-saving renovation of old houses and new buildings. It is unrealistic to use composite energy-saving wall insulation panels
Due to the large difference in thermal conductivity between traditional mortar and masonry, it is easy to produce cold (hot) bridge phenomenon, easy to crack, absorb moisture, etc., and the energy loss caused by cracks can reach more than 20%, which has great defects in external wall insulation.
Slurry thermal insulation mortar can be divided into on-site mixing and premixed slurry. On-site mixing and transportation are convenient, but due to objective reason

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare various raw materials according to the process requirements, and weigh them successively by weight percentage: Portland cement 35%, fly ash 15%, slag powder 5%, (polyethylene-vinyl acetate emulsion 50% and acrylic acid emulsion 25% and polyethylene Formed by 25% vinyl alcohol copolymerization) ternary latex powder 10%, sepiolite 12%, silicon calcium powder 11%, polypropylene fiber 0.35%, brucite fiber 0.15%, polyethylhydroxysiloxane emulsion 10% , sodium dodecyl sulfonate 1.5%, prepare according to the preparation method of the present invention, mix evenly and pack into bags; add appropriate amount of water to the prepared dry powder insulation mortar, form samples according to standard requirements, and test each The performance index is: loose bulk density 335Kg / m 3 , hardened dry density 430Kg / m 3 , compressive strength (28 days) 6.5MPa, bonding strength 1.3MPa, thermal conductivity 0.105W / m.k.

Embodiment 2

[0020] Prepare various raw materials according to the process requirements, and weigh them in turn according to weight percentage: Portland cement 50%, fly ash 18%, (copolymerization of polyethylene-vinyl acetate emulsion 50% and acrylic acid emulsion 50%) binary latex Powder 5%, perlite 11.7%, quartz sand 7.8%, polypropylene fiber 0.2%, brucite fiber 0.3%, water-based water-based silane 6%, sulfonated melamine 1%, prepared according to the preparation method of the present invention, and mixed uniformly Then pack it into the bag; add appropriate amount of water to the prepared dry powder insulation mortar, and form the sample according to the standard requirements. After testing, the performance indicators are: loose bulk density 315Kg / m 3 , hardened dry density 415Kg / m 3 , compressive strength (28 days) 5.3MPa, bonding strength 1.5MPa, thermal conductivity 0.092W / m.k.

Embodiment 3

[0022] Prepare various raw materials according to the process requirements, and weigh them in turn according to weight percentage: 60% of Portland cement, 25% of slag powder, (60% of polyethylene-vinyl acetate emulsion, 25% of acrylic acid emulsion and 15% of polyvinyl alcohol are copolymerized to form 8.5% of) ternary emulsion powder, 5% of flame-retardant polystyrene foam particles, 0.25% of polypropylene fiber, 0.25% of brucite fiber, 0.5% of isopropyl triisostearyl titanate, Kao's 2000 Brand polycarboxylate superplasticizer 0.5%, prepare according to the preparation method of the present invention, mix evenly and pack into bags; add appropriate amount of water to the prepared dry powder insulation mortar, form samples according to standard requirements, and test various properties The index is: loose bulk density 345Kg / m 3 , hardened dry density 435Kg / m 3 , compressive strength (28 days) 6.0MPa, bonding strength 1.1MPa, thermal conductivity 0.112W / m.k.

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Abstract

The invention discloses insulating dry powder mortar which is made from portland cement, pulverized fuel ash and/or slag powder, organic polymer emulsion powder, flame-retardant polystyrene foam particles, thermal insulating aggregate, composite fiber, water resisting agent and admixture. The insulating dry powder mortar has the advantages of light volume weight, low thermal conductivity, comprehensive utilization of waste material, environmental protection, resource saving, cracking resistance, ageing resistance, strong cohesive force, favorable workability and construction performance, convenient use, waterproofness, permeation resistance, high compression strength, convenient storage and transportation, no environmental pollution, and the like and can be widely used for preserving heat in the internal wall and the external wall of a building and other special engineering.

Description

technical field [0001] The invention belongs to the technical field of building materials and chemistry, and relates to a mortar for construction engineering, which is specifically used for heat preservation of interior and exterior walls of buildings, and in particular to a dry powder heat preservation mortar which comprehensively utilizes waste, is waterproof and anti-seepage, resists cracking, and is environmentally friendly. Background technique [0002] With the continuous improvement of environmental protection and energy conservation requirements, the country vigorously advocates environmental protection and energy-saving building structures, and the thermal insulation technology of building envelopes has become the most important way for building energy conservation. At present, the external wall insulation system in China mainly includes thermal insulation boards and thermal insulation mortars. Since thermal insulation boards are difficult to be used in the thermal i...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/08C04B18/12C04B18/14C04B14/38C04B16/06
CPCC04B20/0068C04B2111/28C04B28/04Y02W30/91C04B14/38C04B16/0633C04B14/042C04B14/043C04B14/06C04B14/12C04B14/185C04B14/204C04B14/24C04B18/08C04B18/141C04B24/045C04B24/122C04B24/16C04B24/20C04B24/223C04B24/2641C04B24/32C04B24/42C04B2103/63C04B2103/65C04B14/305C04B16/08C04B24/40C04B24/405
Inventor 吕运征柳舒吕运凤
Owner CHANGSHA YUANPENG CHEM TECH
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