CN201343821Y

CN201343821Y - Ordinary concrete and recycled concrete laminated superposed beam

Info

Publication number: CN201343821Y
Application number: CNU2008201246028U
Authority: CN
Inventors: 张建伟; 曹万林; 徐泰光; 尹海鹏; 张亚齐
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2008-12-12
Filing date: 2008-12-12
Publication date: 2009-11-11
Anticipated expiration: 2018-12-12

Abstract

The utility model relates a beam, in particular to an ordinary concrete and recycled concrete laminated superposed beam. The beam comprises a bottom part made of ordinary concrete, an upper part made of ordinary concrete, and an intermediate layer made of recycled concrete, which are superimposed upon each other. Bars include a longitudinal stress bar, a hoop reinforcement, a bearing rod and a bent-up bar. The construction process involves pouring ordinary concrete at the bottom part, pouring recycled concrete on the bottom part, pouring ordinary concrete at the top part, maintenance, and removing mould after formation. Since the normal stress in the vicinity of the neutral axis of the beam is relatively small, the use of the recycled concrete can basically meet the mechanical property requirements of the beam; and the stress felt by the upper and the lower ends of the beam are so large that only the ordinary concrete which has stable performance can resist. Therefore, with the superposed beam retaining the required bearing capacity and ductility, the utility model makes effective use of the recycled concrete, thereby achieving double effect, namely environmental protection as well as practicality.

Description

Ordinary concrete and regeneration concrete layering stacking beam

Technical field

The utility model is a kind of beam, particularly a kind of ordinary concrete and regeneration concrete layering stacking beam.

Background technology

Along with the development of urbanization process, environmental problem highlights day by day, and sustainable development is brought into schedule.Utilizing Limited resources effectively and reasonably is the only way of realizing sustainable development.

China is the resources consumption big country of a shortage of resources, extensive operation, and economic growth more and more is subjected to the constraint of resource and environment.Being on the increase of the building waste that produces along with builing industry recycled discarded concrete, with the discarded concrete resource, is processed into regeneration aggregate and then is mixed with regeneration concrete, not only can realize recycling, and can solve the component environment problem.The application of building structure central sill is very extensive, therefore, from economizing on resources, changes the extensive operation mode of production, walks the angle of sustainable development path and considers that the research that regeneration concrete is applied to beam just has very important realistic meaning.

The domestic and international mechanical property requirements that can satisfy structure basically to the material property that studies show that regeneration concrete and the mechanical property of regeneration concrete, but since the adhesive property of regeneration concrete and reinforcing bar a little less than, therefore utilize the application of whole regeneration concretes making beams fewer.

The utility model content

Technical problem to be solved in the utility model is exactly under the condition of the bearing capacity that ensures beam, improves the application of regeneration concrete in beam, realizes the regeneration of the energy.For this purpose, the utility model proposes a kind of ordinary concrete and regeneration concrete layering stacking beam.

To achieve these goals, the utility model has been taked following technical scheme.This superposed beam comprise the ordinary concrete at the steel mesh reinforcement that is configured in the beam, the bottom that is cast in beam and top and be cast in the top and the concrete of bottom between regeneration concrete.Described steel mesh reinforcement is made up of longitudinal stress reinforcing bar, stirrup, bearing rod and bent-up bar.

The thickness of the bottom of described beam and the ordinary concrete at top is all greater than 100 millimeters.

The preparation method of a kind of ordinary concrete and regeneration concrete layering stacking beam, this method may further comprise the steps:

1) steel mesh reinforcement of colligation beam, described steel mesh reinforcement comprises longitudinal stress reinforcing bar, stirrup, bearing rod and bent-up bar; The colligation mode is determined according to related specifications;

2) make template, at the bottom pouring ordinary concrete of beam, steel mesh reinforcement is a protective layer thickness apart from the distance of bottom template;

3) in step 2) the basis on continue the regeneration concrete in cast intermediate layer;

4) continuation is at the top pouring ordinary concrete of beam on the basis of step 3), and steel mesh reinforcement is a protective layer thickness apart from the distance of upper mould;

5) after maintenance reaches requirement of strength, the template of dismantling, ordinary concrete and regeneration concrete are connected as a single entity, and are ordinary concrete and regeneration concrete layering stacking beam.

The utility model is poured into a mould regeneration concrete at the top and the bottom pouring ordinary concrete of beam between the ordinary concrete of top and bottom.Because the normal stress at the neutral axis place of beam is zero, and near the normal stress the neutral axis is all smaller, so can use regeneration concrete in the place of structure stress weakness, the stressed bigger more stable ordinary concrete of marginal portion functional performance, and do not influence the bearing capacity and the ductile performance of beam.Thereby reached the instructions for use of both satisfying structure, increased the application of regeneration concrete in beam again.

Description of drawings

Fig. 1 is the arrangement of reinforcement schematic diagram of the utility model ordinary concrete and regeneration concrete layering stacking beam;

Fig. 2 is the schematic diagram in the A-A cross section of Fig. 1;

Among the figure: 1, ordinary concrete, 2, regeneration concrete, 3, the longitudinal stress reinforcing bar, 4, stirrup, 5, bearing rod, 6, bent-up bar.

The specific embodiment

Below in conjunction with Fig. 1～Fig. 2 the utility model embodiment is described in further detail:

Present embodiment is ordinary concrete and regeneration concrete layering stacking beam, and this superimposition beam is formed by the ordinary concrete 1 of steel mesh reinforcement, top and bottom and regeneration concrete 2 superpositions of mid portion.Steel mesh reinforcement comprises longitudinal stress reinforcing bar 3, stirrup 4, bearing rod 5 and bent-up bar 6.The thickness of the ordinary concrete 1 of top and bottom is all greater than 150 millimeters.Concrete is all cast-in-place.Promptly be combined as holistic ordinary concrete and regeneration concrete layering stacking beam after the engineering completion.

The preparation method of ordinary concrete and regeneration concrete layering stacking beam, its order is as follows:

1) according to the steel mesh reinforcement of the actual loading situation of beam configuration colligation beam, steel mesh reinforcement comprises: longitudinal stress reinforcing bar 3, stirrup 4, bearing rod 5 and bent-up bar 6.Stirrup is a rectangle hoop, to play effect of contraction; The colligation mode is determined according to related specifications;

2) make template, at the bottom pouring ordinary concrete 1 of beam, steel mesh reinforcement is a protective layer thickness apart from the distance of bottom template; The thickness of bottom ordinary concrete 1 is 150mm;

3) in step 2) the basis on continue the regeneration concrete 2 in cast intermediate layer;

4) continuation is at the upper pouring ordinary concrete 1 of beam on the basis of step 3), and steel mesh reinforcement is a protective layer thickness apart from the distance of upper mould; The thickness of top ordinary concrete 1 is 150mm;

Claims

1, ordinary concrete and regeneration concrete layering stacking beam comprise the steel mesh reinforcement that is configured in the beam; It is characterized in that: the bottom and the top pouring of beam have ordinary concrete, are cast with regeneration concrete between the ordinary concrete of top and bottom.

2, ordinary concrete according to claim 1 and regeneration concrete layering stacking beam, the thickness of ordinary concrete that it is characterized in that the bottom of described beam and top is all greater than 100 millimeters.