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Waterproof type foam concrete permanent heat preservation formwork

A technology of foam concrete and thermal insulation formwork, which is applied in the field of concrete and waterproof foam concrete permanent thermal insulation formwork. It can solve the problems of large shrinkage rate, low early strength, and durability deviation, etc., and achieve non-shrinkage durability and waterproof performance. Strong and hard effect

Active Publication Date: 2016-03-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, from the current various types of porous concrete, the waterproof materials used are basically silicone materials, but the water absorption rate of its products is still high, and there are relatively large drying shrinkage rates, low early strength and durability deviations in terms of performance. and other defects

Method used

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  • Waterproof type foam concrete permanent heat preservation formwork

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a waterproof foam concrete thermal insulation permanent template, the template is composed of a foam concrete waterproof thermal insulation layer 1, an anchored hook groove 2 and embedded reinforcing steel bars 3, wherein: in the foam concrete waterproof thermal insulation layer 1 is provided with the anchor hook groove 2 for fixing; the embedded reinforcing steel bar 3 is arranged at the stressed place of the anchor hook groove 2.

[0031] The foam concrete waterproof insulation layer 1 is a waterproof foam concrete material, including a solid part and a foaming agent foam, and the volume of the foaming agent foam is 50 times the total volume of the solid part, wherein: the mass percentage contained in the solid part is: cement 49%, 0.32% siloxane, 50% silica fume, 0.18% water reducer, 0.5% setting material.

[0032] The cement is ordinary Portland cement with a strength grade of 42.5 (P.O42.5).

[0033] In this embodiment, the particle size o...

Embodiment 2

[0036] This embodiment provides a waterproof foam concrete thermal insulation permanent template, the template is composed of a foam concrete waterproof thermal insulation layer 1, an anchored hook groove 2 and embedded reinforcing steel bars 3, wherein: in the foam concrete waterproof thermal insulation layer 1 is provided with the anchor hook groove 2 for fixing; the embedded reinforcing steel bar 3 is arranged at the stressed place of the anchor hook groove 2.

[0037] The foam concrete waterproof insulation layer 1 is a waterproof foam concrete material, and the waterproof foam concrete material includes a solid part and a foaming agent foam, and the volume of the foaming agent foam is 60 times the total volume of the solid part, wherein the solid part The mass percentage contained is: 57% of cement, 0.32% of siloxane, 42% of silica fume, 0.18% of water reducing agent, and 0.5% of setting material.

[0038] The cement is ordinary Portland cement with a strength grade of 42...

Embodiment 3

[0043] The difference from the examples is that the waterproof foam concrete material includes a solid part and a blowing agent foam, and the volume of the blowing agent foam is 70 times the total volume of the solid part, wherein: the composition of the solid part is by weight The percentages are: 30% of cement, 2% of siloxane, 67.5% of silica fume, 0.2% of water reducer, and 0.3% of setting material.

[0044] In the construction process of this embodiment, the waterproof foam concrete permanent thermal insulation formwork is embedded in the steel mesh of beams, columns and slabs through the anchor hook groove 2; when pouring concrete, the anchor hook groove 2 is used to place the The above-mentioned waterproof foam concrete permanent insulation formwork is permanently fixed on the wall and used instead of the traditional formwork.

[0045] The invention strengthens the durability and safety of the waterproof and thermal insulation of the external wall, can meet the fire preven...

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Abstract

The invention relates to a waterproof type foam concrete permanent heat preservation formwork. The formwork is composed of a foam concrete waterproof heat preservation layer, anchoring type hook grooves and embedded reinforcing steel bars. The anchoring type hook grooves are formed in the foam concrete waterproof heat preservation layer. The embedded reinforcing steel bars are arranged at the force bearing positions of the anchoring type hook grooves. The solid part of the foam concrete waterproof heat preservation layer is prepared from, by weight, 29-57% of cement, 0.25-2.20% of siloxane, 40-70% of siliceous dust, 0.15-0.35% of water reducing agent and 0.3-0.5% of setting control material. Foaming agent foam is prepared by conducting foaming on a foaming agent and an aqueous solution. The volume of foaming agent foam is 50-80 times of the total volume of the solid part. The formwork can be used for structures such as roofs, floor heating projects and external walls, a support is detached after foam concrete pouring reaches the strength, the permanent heat preservation formwork and structure are permanently fixed, the cost of the formwork is reduced, and the construction period is shortened.

Description

technical field [0001] The invention relates to concrete in the technical field of construction engineering, in particular to a waterproof foam concrete permanent thermal insulation template. Background technique [0002] The damage or destruction of concrete structures caused by environmental factors mainly include concrete carbonation, chloride ion erosion, alkali-aggregate reaction, freeze-thaw cycle damage, etc. It is worth noting that almost all the effects of erosion on concrete and steel bars require water as a medium. On the other hand, almost all the damage to concrete structures caused by erosion is related to the expansion of concrete caused by erosion and eventually leads to cracking of concrete structures. related, and when the concrete structure cracks, the erosion rate will be greatly accelerated, and the durability of the concrete structure will further deteriorate. [0003] For foam concrete, in view of its porous structure, the shortcomings of high water a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10E04G9/10C04B111/27C04B111/40
CPCC04B28/04C04B2111/27C04B2111/40E04G9/10C04B24/42C04B18/146C04B2103/302C04B22/147C04B38/106C04B22/0093
Inventor 方从启李驰周岱
Owner SHANGHAI JIAO TONG UNIV
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