CN105274963A - Application of foam concrete in architectural engineering - Google Patents

Abstract

Provided is application of foam concrete in architectural engineering. The application comprises: using the foam concrete as retaining walls. The foam concrete is mainly used as rock walls of ports. Using the foam concrete on the rear of quay walls as a light backfill material can reduce vertical load, and reduce lateral load on the quay walls. The foam concrete is a rigid body in good adhesive property, and does not apply lateral pressure on the quay walls along the periphery. Application of the foam concrete reduces sedimentation, and maintenance cost is reduced with reduction of sedimentation, so as to save much expenses.

Description

The application of foam concrete in construction work

Technical field

The invention belongs to building material field, the particularly application of foam concrete in construction work.

Background technology

Foam concrete is a member in concrete extended familys, in recent years, all pays much attention to the research and development of foam concrete both at home and abroad, makes its application at building field more and more wider, is now described below by interesting cases:

One, the characteristic of foam concrete

The foaming agent aqueous solution is normally mechanically prepared into foam by foam concrete, again foam is joined in the slip formed containing siliceous material, calcareous material, water and various Admixtures etc., through a kind of porous material of mix and blend, moulding by casting, maintenance.Owing to containing a large amount of blind bore gap in foam concrete, make it have following good physical and mechanical property.

1, the density of light foam concrete is little, and density rating is generally 300-1800kg/m3, and the density rating of conventional foam concrete is 300-1200kg/m3, and in recent years, density is that the ultralight foam concrete of 160kg/m3 also obtains application in construction work.Because the density of foam concrete is little, in the building structure such as external and internal wall, aspect, flooring, column of building, adopt this kind of material, generally can make building deadweight reduction about 25%, some can reach the 30%-40% of works gross weight.And, for structural element, as adopted foam concrete to replace ordinary concrete, the bearing capacity of component can be improved.Therefore, in construction work, foam concrete is adopted to have significant economic benefit.

2, thermal and insulating performance is good

Owing to containing a large amount of tiny hole closed in foam concrete, therefore have good thermal property, namely good thermal and insulating performance, this is not available for ordinary concrete.Usual density rating is at the foam concrete of 300-1200kg/m3 scope, and coefficient of thermal conductivity is between 0.08-0.3w/ (mK).Adopt foam concrete as building masonry wall and roofing materials, there is good energy-saving effect.

3, sound-proof refractory performance is good

Foam concrete genus polyporus material, therefore it is also a kind of good sound insulation materials, this material can be adopted as puigging at the floor of building and the sound insulating panel of speedway, the top layer etc. of underground structure.Foam concrete is inorganic material, can not burn, thus has good refractoriness, and building uses, and can improve the fireproof performance of building.

4, other performance

It is good that foam concrete also has pumpability in work progress, and waterproof ability is strong, the advantages such as impact energy absorption characteristic is good, can utilize industrial residue in a large number, cheap.

Two, the production technology of foam concrete

The base stock of foam concrete is cement, lime, water, foam, on this basis some fillers of admixture, aggregate and Admixture.Conventional filler and aggregate are: sand, flyash, haydite, stone fragment, expanded polystyrene, expanded perlite, benzene take off gram fines, and conventional Admixture is the same with ordinary concrete, are water reducing agent, waterproof agent, retarding agent, setting accelerator etc.The production method of foam concrete has damp sand slurry processes and dry sand slurry processes two kinds.Cement, sand and water etc. are normally stirred into mortar at concrete mixing plant by damp sand slurry processes, and be transported to building site with truck mixer car, again the foam made separately is added mortar, foam and mortar are mixed thoroughly by mixer, then the foam concrete prepared are injected pump truck conveying or on-the-spot directly construction.Dry sand slurry processes is that each dry basis (cement, flyash etc.) is delivered to job site by Bulk Transport & its or transmission system, dry basis and water mix at the construction field (site), then the foam made separately is added mortar, both are mix in homogenizer, then for site operation.

Three, the application present situation of China's foam concrete

In recent years, China more and more payes attention to Building Energy-saving Work, and along with the enforcement with building energy conservation relevant policies, materials for wall reform achieves significant achievement, and energy-saving material is favourably welcome.Foam concrete, with its good characteristic, in energy-saving wall material, also obtain application in other side.At present, foam concrete is as follows in the applicable cases of China.

1, foam concrete block

Foam concrete block is the maximum a kind of material of foam concrete application quantity in materials for wall.As the infilled wall of frame construction, mainly utilize the feature of the good and high-strength light of this building block heat-proof quality.Also be used as wall insulating layer, polystyrene foam concrete block, for urban building construction.Can be used for inside and outside non-lbearing wall material, also can be used for roofing heat insulating material.It has the advantages such as quality is light, coefficient of thermal conductivity is little, frost resistance is high, fire prevention, production is simple, cost is lower, easy construction.

2, foamed concrete light wall slab

China Building Materials Academy have developed the production technology of Fly ash foam cement Light trabs, and obtains application.Compared with traditional GRC Light trabs, adopt foam concrete production technology, not only obviously can reduce the cost of product, and substantially improve the mobility of slurry, make shaping more convenient.

3, foam concrete compensates ground

Modern building design more and more payes attention to the free settling of building in work progress with construction.Require must fill out soft material on lower its basis of part of building deadweight in Building Design process, use as compensation ground.Foam concrete can meet the requirement compensating foundation material preferably.This kind of concrete intensity of low density foam can control well in the scope of design, and has good compressibilty.

Summary of the invention

The object of this invention is to provide the application of a kind of foam concrete in construction work, to expand its purposes.Make full use of the superperformance of foam concrete, its application in construction work is constantly expanded, accelerates programming, improve workmanship.

For achieving the above object, the present invention is by the following technical solutions:

The application of foam concrete in construction work, has following several:

(1) as retaining wall: the main dike being used as harbour, foam concrete is used as lightweight backfilling material after quaywall can reduce vertical load, decrease the lateral load to quaywall, foam concrete is the rigid body that a kind of adhesive property is good, it does not peripherally apply lateral pressure to quaywall, sedimentation reduces, and maintenance cost reduces thereupon, thus saves a lot of spending;

(2), sports ground and track and field runway is built: use the permeable foam concrete that drainability is strong basic as lightweight, above coated with gravel or artificial turf, use as sports ground; The density of foam concrete is 800-900kg/m3, and this type of sports ground can carry out hockey, and football and tennis are movable, or at the thick porous asphalt layer of foam concrete upper cover last layer 0.05m and plastic layer, then can be used as track and field runway;

(3), sandwich parts is made: foam concrete can be adopted when precast reinforced concrete structure as inner core, make it have the superperformance that high-strength light is heat insulation.Usual employing density is the foam concrete of 400-600kg/m3;

(4), as combined wall board: be made into various light weight board with foam concrete, in frame construction, be used as heat insulation filled wall or make combined wall board with steel sheet, the density of foam concrete is generally about 600kg/m3;

(5), other: foam concrete also can be used for the insulation filling of the support fire wall of storage tank footing, sound insulation flooring fill, tunnel bushing pipe backfill; And power supply, water pipeline the aspect such as isolation.

Beneficial effect: the present invention makes full use of the superperformance of foam concrete, constantly expands its application in construction work, accelerates programming, improve workmanship.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

1, the dike at harbour is mainly used as retaining wall.Foam concrete is used as lightweight backfilling material after quaywall can reduce vertical load, decreases the lateral load to quaywall.Foam concrete is the rigid body that a kind of adhesive property is good, and it does not peripherally apply lateral pressure to quaywall, and sedimentation reduces, and maintenance cost reduces thereupon, thus saves a lot of spending.Foam concrete also can be used to the stability of promoting side slope of embankment, replaces the part soil of side slope, owing to alleviating quality, thus just reduce the active force affecting slope stability with it.

2, sports ground and track and field runway is built

Use the permeable foam concrete that drainability is strong basic as lightweight, above coated with gravel or artificial turf, use as sports ground.The density of foam concrete is 800-900kg/m3.This type of sports ground can carry out hockey, football and tennis activity.Or at the thick porous asphalt layer of foam concrete upper cover last layer 0.05m and plastic layer, then can be used as track and field runway.

3, sandwich parts is made

Foam concrete can be adopted when precast reinforced concrete structure as inner core, make it have the superperformance that high-strength light is heat insulation.Usual employing density is the foam concrete of 400-600kg/m3.

4, as combined wall board

Be made into various light weight board with foam concrete, in frame construction, be used as heat insulation filled wall or make combined wall board with steel sheet, the density of foam concrete is generally about 600kg/m3.

5, other

Foam concrete also can be used for the insulation filling of the support fire wall of storage tank footing, and sound insulation flooring is filled, the backfill of tunnel bushing pipe; And power supply, water pipeline the aspect such as isolation.

The specific embodiment of the present invention is described although above-mentioned in conjunction with the embodiments; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that performing creative labour can make still within protection scope of the present invention.

Claims (1)

1. the application of foam concrete in construction work, is characterized in that: have following several:

(1) as retaining wall: the main dike being used as harbour, foam concrete is used as lightweight backfilling material after quaywall can reduce vertical load, decrease the lateral load to quaywall, foam concrete is the rigid body that a kind of adhesive property is good, it does not peripherally apply lateral pressure to quaywall, sedimentation reduces, and maintenance cost reduces thereupon, thus saves a lot of spending;

(2), sports ground and track and field runway is built: use the permeable foam concrete that drainability is strong basic as lightweight, above coated with gravel or artificial turf, use as sports ground; The density of foam concrete is 800-900kg/m3, and this type of sports ground can carry out hockey, and football and tennis are movable, or at the thick porous asphalt layer of foam concrete upper cover last layer 0.05m and plastic layer, then can be used as track and field runway;

(3), sandwich parts is made: foam concrete can be adopted when precast reinforced concrete structure as inner core, make it have the superperformance that high-strength light is heat insulation; Usual employing density is the foam concrete of 400-600kg/m3;

(4), as combined wall board: be made into various light weight board with foam concrete, in frame construction, be used as heat insulation filled wall or make combined wall board with steel sheet, the density of foam concrete is generally about 600kg/m3;

(5), other: foam concrete also can be used for the insulation filling of the support fire wall of storage tank footing, sound insulation flooring fill, tunnel bushing pipe backfill; And power supply, water pipeline the aspect such as isolation.