Self-heat-preservation outer wall board and outer wall for fabricated building

A self-insulation technology for buildings, applied in buildings, building components, building structures, etc., can solve problems that affect building functions, increase construction difficulty, and wall panel deformation, so as to save vibration and prevent cavity walls Strong effect of cracking and deformation resistance

Active Publication Date: 2018-01-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still many deficiencies in the traditional prefabricated self-insulating exterior wall panels
First of all, its cross-sectional structure mostly adopts the form of a single row of large holes, and the thin ribs between the large holes run through the whole board, which is easy to form a cold and heat bridge.
Secondly, the splicing of slabs is usually treated with concrete post-casting belts, which not only increases the difficulty of construction, but also tends to form hot and cold bridges at the joints; and the rigid bonding between the slabs is easy to cause wallboards to expand when thermal expansion and contraction. out of shape
In addition, due to the shrinkage of the concrete base material of the wallboard, it is easy to produce tiny visible cracks on the thin ribs and the board surface, which will cause water seepage in the wallboard in the long run and affect the normal use function of the building

Method used

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  • Self-heat-preservation outer wall board and outer wall for fabricated building
  • Self-heat-preservation outer wall board and outer wall for fabricated building
  • Self-heat-preservation outer wall board and outer wall for fabricated building

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: 320 parts of grade 42.5 ordinary Portland cement; 56 parts of fly ash; 27 parts of silica fume; 48 parts of slag powder; 780 parts of sand; 966 parts of crushed stone; 24 parts of calcium sulfoaluminate-calcium oxide expansion agent; 6 parts of lightly burned magnesium oxide; 9.5 parts of 5mm steel fiber; 17.5 parts of 12mm steel fiber; 142 parts of water. The expansion of fresh concrete is 686mm, the air content is 2.8%, T 500 It is 7.8s, there is no bleeding phenomenon, and the self-compacting performance is excellent; after curing in water for 14 days, the shrinkage rate of concrete dried in air for 60 days is 85με, there is no crack on the surface, and the apparent quality is excellent.

Embodiment 2

[0029] Example 2: 375 parts of grade 42.5 ordinary Portland cement; 63 parts of fly ash; 32 parts of silica fume; 52 parts of slag powder; 750 parts of sand; 948 parts of crushed stone; 27 parts of calcium sulfoaluminate-calcium oxide expansion agent; 8 parts of lightly burned magnesium oxide; 9 parts of 5mm steel fiber; 21 parts of 12mm steel fiber; 150 parts of water. The expansion of fresh concrete is 655mm, the air content is 1.9%, T 500 It is 5.3s, there is no bleeding phenomenon, and the self-compacting performance is excellent; after curing in water for 14 days, the shrinkage rate of concrete dried in air for 60 days is 71με, there is no crack on the surface, and the apparent quality is excellent.

Embodiment 3

[0030]Example 3: 358 parts of 52.5 grade Portland cement; 52 parts of fly ash; 35 parts of silica fume; 50 parts of slag powder; 760 parts of sand; 942 parts of crushed stone; 28 parts of calcium aluminate-calcium oxide expansion agent; 7 parts of light-burned magnesium oxide; 10.5 parts of 5mm steel fiber; 19.5 parts of 12mm steel fiber; 146 parts of water. The expansion of fresh concrete is 670mm, the air content is 2.2%, T 500 It is 7.1s, there is no bleeding phenomenon, and the self-compacting performance is excellent; after curing in water for 14 days, the shrinkage rate of concrete dried in air for 60 days is 59με, there is no crack on the surface, and the apparent quality is excellent.

[0031] The prefabricated insulation pieces 2, 3 and 4 are prepared from aerogel-gypsum-based cementitious material-fiber composite materials, the examples are as follows:

[0032] Example 1: 480 parts of gypsum; 90 parts of 42.5 grade Portland cement; 115 parts of fly ash; 20 parts of ...

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Abstract

The invention discloses a self-heat-preservation outer wall board and outer wall for a fabricated building. The self-heat-preservation outer wall board comprises a wall board base body and a prefabricated heat-preservation piece embedded in the wall board base body; the wall board base body is composed of an upper transverse rib board, a lower transverse rib board and an intermediate rib board; arow of semicircular hole channels is formed in each of the upper transverse rib board and the lower transverse rib board at intervals, and a row of rectangular hole channels is formed in the intermediate rib board at intervals; a female mortise and a male mortise are formed in the transverse splicing face of the wall board base body; and during mounting, the two ends of a wall board splicing seamare filled with elastic waterproof sealant, and the middle of the wall board splicing seam is filled with heat-preservation anti-crack bonding mortar. The self-heat-preservation outer wall board has the advantages of good integrity, stable force bearing, lightness, earthquake resistance, heat preservation, sound insulation and the like.

Description

Technical field: [0001] The invention relates to a self-heat-insulating outer wall panel for prefabricated buildings, which belongs to the field of building wall materials. Background technique: [0002] Driven by the national building energy-saving and wall material reform policies, prefabricated buildings have been vigorously promoted. As an important part of the building envelope, prefabricated external wall panels have a large market demand and good development prospects. [0003] The thermal insulation methods of prefabricated external wall panels are divided into three categories: external thermal insulation, internal thermal insulation and self thermal insulation. The first two types are widely used but have obvious shortcomings. The external insulation system has poor durability and cannot have the same life as the main body of the structure. It is easy to age and fall off, causing safety accidents. The internal thermal insulation system is easy to form hot and cold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C2/30E04C2/288C04B28/04C04B28/14C04B14/48C04B14/06C04B38/08
CPCY02A30/244
Inventor 耿飞桂敬能林辉朱玉翔吴成浩吴春晓鲍立毅解建光
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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