CN101418629A

CN101418629A - Regenerated composite reinforced concrete beam and construction method thereof

Info

Publication number: CN101418629A
Application number: CNA2008101990906A
Authority: CN
Inventors: 吴波; 刘伟; 刘琼祥; 许喆
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2008-10-14
Filing date: 2008-10-14
Publication date: 2009-04-29
Anticipated expiration: 2028-10-14
Also published as: CN101418629B

Abstract

The invention discloses a regenerated mixed reinforced concrete beam and a construction method thereof. The regenerated mixed reinforced concrete beam comprises disused concrete blocks, new concrete, and steel bars, wherein the disused concrete blocks are dispersed in the beam, and the configuration mode of the reinforcement is same to that of the conventional reinforced concrete. The construction includes the steps that: firstly, bound steel bars are put in a formwork, then a layer of new concrete is poured, and then the discussed concrete blocks and new concrete are alternately put in the formwork, wherein the mass ratio of the discussed concrete blocks and the new concrete is 1:4 to 1:1. Compared with conventional regenerated aggregate concrete member, the invention can save a great amount of energy consumed in the processes of breaking, screening, purifying and the like for the concrete waste, save a great amount of water, cement, sandstones and energy consumed for preparing regenerated aggregate concrete having equivalent volume with the disused concrete blocks, and provides a new approach for building industry to perform the national strategy of environmental protection, energy conservation and emission reduction.

Description

Regenerated composite reinforced concrete beam and job practices thereof

Technical field

The present invention relates to concrete debris regenerative use technology field, be specifically related to a kind of regenerated composite reinforced concrete beam and job practices thereof that comprises waste concrete block.

Background technology

At present, the concrete solid waste overwhelming majority that the old building demolition of China produces all is directly to transport the countryside to stack, and the concrete that new building needs adopts materials such as new cement, stone, river sand formulated fully.The harm that causes thus comprises: 1. discarded object appropriation of land, contaminated soil and water body; 2. excessively cut into a mountain for quarrying and destroy surface vegetation and original landforms, cause the soil erosion and the deterioration of the ecological environment; 3. a large amount of washing in a pan dug sand breaking-up riverbed, river and dykes and dams, jeopardizes river safety; 4. a large amount of energy of manufacture of cement consumption and cause serious environment pollution.For this reason, the concrete the solid waste how old building demolition of scientific utilization produces, to reduce the consumption of new building as far as possible, become whole building trade and practiced " environmental protection, energy-conservation, reduction of discharging " national strategy institute problem demanding prompt solution materials such as new cement, stone, river sand.

Regenerated aggregate concrete utilizes approach all to obtain to a certain degree research at home and abroad as concrete debris a kind of again, so-called regenerated aggregate concrete, it is exactly concrete debris with old building demolition gained, through processes such as fragmentation, screening, purifications, obtain the particle of a large amount of aggregate yardsticks, utilize its preparation then and as placed concrete.But above-mentioned processing not only process is loaded down with trivial details, and consume a large amount of energy, in the process for preparation of regenerated aggregate concrete, still need wasteful water gaging, cement, sandstone and the energy in addition, therefore be necessary to seek a kind of more rational concrete debris and recycle strategy.

Summary of the invention

Purpose of the present invention is exactly for overcoming the deficiencies in the prior art, a kind of regenerated composite reinforced concrete beam and job practices thereof are provided, by exempting or simplify processing procedures such as the fragmentation of concrete debris in utilizing again, screening, purification, thereby save a large amount of energy that said process consumed, and spent big water gaging, cement, sandstone and the energy of the regenerated aggregate concrete suitable with waste concrete block volume preparation, finally concrete debris is recycled with less energy consumption and consumed resource.

Purpose of the present invention realizes by following method:

Above-mentioned regenerated composite reinforced concrete beam is characterized in that comprising waste concrete block, as placed concrete and reinforcing bar, and described reinforcing bar is built in the beam as the skeleton of beam, and by the as placed concrete parcel, waste concrete block is scattered in the as placed concrete around the reinforcing bar.

In the above-mentioned regenerated composite reinforced concrete beam, described waste concrete block is the discarded concrete block that old structure (as building, structure, road, bridge or dykes and dams etc.) is removed gained.

In the above-mentioned regenerated composite reinforced concrete beam, described waste concrete block is for removing reinforcing bar discarded concrete block afterwards.

In the above-mentioned regenerated composite reinforced concrete beam, described waste concrete block should be able to directly or after simple processing use.

In the above-mentioned regenerated composite reinforced concrete beam, described waste concrete block is scattered in the beam, all is filled with as placed concrete between each waste concrete block.

In the above-mentioned regenerated composite reinforced concrete beam, described as placed concrete is natural aggregate concrete or regenerated aggregate concrete.

In the job practices of above-mentioned regenerated composite reinforced concrete beam, described job practices is: the reinforcing bar that colligation is good places in the template earlier, builds one deck as placed concrete then, waste concrete block, as placed concrete is alternately inserted in the template subsequently again.

In the job practices of above-mentioned regenerated composite reinforced concrete beam, described waste concrete block needs water to clean before in inserting template and fully soaks.

In the job practices of above-mentioned regenerated composite reinforced concrete beam, the mass ratio of described waste concrete block and as placed concrete is 1:4～1:1.

With respect to prior art, the present invention has following advantage: processing procedures such as fragmentation during concrete debris utilizes again, screening, purification have been exempted or simplified in (1), thereby a large amount of energy that said process consumed have been saved, and spent big water gaging, cement, sandstone and the energy of the regenerated aggregate concrete suitable with waste concrete block volume preparation, finally concrete debris is recycled with less energy consumption and consumed resource.(2) waste concrete block cleans through water and fully soaks before use, makes between new, the old concrete and can realize better bonding.(3) mass ratio of waste concrete block and as placed concrete is 1:4～1:1, has both made discarded concrete obtain utilizing more fully, also makes the service behaviour of beam preferable.(4) job practices of the present invention's proposition is simple.

Description of drawings

Fig. 1 is one embodiment of the invention regenerated composite reinforced concrete beam schematic perspective view;

Fig. 2 is that the A-A of regenerated composite reinforced concrete beam shown in Figure 1 is to generalized section;

Fig. 3 be regenerated composite reinforced concrete beam shown in Figure 1 B-B to generalized section.

Shown in the figure: 1, reinforcing bar 2, as placed concrete 3, waste concrete block

The specific embodiment

Below in conjunction with drawings and Examples concrete enforcement of the present invention is further described.

As shown in Figure 1, 2, 3, a kind of regenerated composite reinforced concrete beam comprises reinforcing bar 1, as placed concrete 2, waste concrete block 3.Fig. 1 is the schematic perspective view of regenerated composite reinforced concrete beam.Fig. 2 be regenerated composite reinforced concrete beam shown in Figure 1 A-A to generalized section, Fig. 3 be regenerated composite reinforced concrete beam shown in Figure 1 B-B to generalized section.

When regenerated composite reinforced concrete beam is made, at first that colligation is good reinforcing bar places in the template, build one deck as placed concrete then, again waste concrete block, as placed concrete are alternately inserted in the template subsequently, make by fully vibrating and wrap up by as placed concrete around all being filled with as placed concrete and reinforcing bar between each waste concrete block.Template construction adopts the job practices of conventional reinforced concrete beam.Waste concrete block only water cleans, and also can adopt chemical agent such as water glass to soak to improve its performance, and the mass ratio of waste concrete block and as placed concrete is 1:4～1:1.

Claims

1, a kind of regenerated composite reinforced concrete beam is characterized in that comprising waste concrete block, as placed concrete and reinforcing bar, and described reinforcing bar is built in the beam as the skeleton of beam, and by the as placed concrete parcel, waste concrete block is scattered in the as placed concrete around the reinforcing bar.

2, regenerated composite reinforced concrete beam according to claim 1 is characterized in that described waste concrete block is the discarded concrete block that old building, structure, road, bridge or dykes and dams are removed gained.

3, regenerated composite reinforced concrete beam according to claim 2 is characterized in that described waste concrete block is for removing reinforcing bar discarded concrete block afterwards.

4, regenerated composite reinforced concrete beam according to claim 1 is characterized in that described waste concrete block is scattered in the beam, all is filled with as placed concrete between each waste concrete block.

5, regenerated composite reinforced concrete beam according to claim 4 is characterized in that described as placed concrete is natural aggregate concrete or regenerated aggregate concrete.

6, the job practices of the described regenerated composite reinforced concrete beam of claim 1～5 is characterized in that the reinforcing bar that colligation is good places in the template earlier, builds one deck as placed concrete then, waste concrete block, as placed concrete is alternately inserted in the template subsequently again.

7, job practices according to claim 6 is characterized in that before described waste concrete block is in inserting template that water cleans and fully soaks.

8, job practices according to claim 6, the mass ratio that it is characterized in that described waste concrete block and as placed concrete is 1:4～1:1.