Construction process of throwing and filling aggregate pavement concrete

Abstract

The invention provides a construction process for preparing pavement concrete by using an aggregate filling mode. The process is to fill a certain amount of aggregate into the pavement concrete to prepare aggregate interlocking pavement concrete. Coarse aggregate, namely the aggregate which accounts for 5 to 15 percent of the volume of a finished product of concrete is evenly spread on under layers such as a wet pavement base course, an old pavement or a bedding course and so on, and then the aggregate is spread with road concrete the strength and the working performance of which meet the requirement, and then an aggregate filling concrete pavement with the performance superior to that of an ordinary concrete pavement is prepared through tamping compaction and due subsequent processes. The concrete has high volume rate of the aggregate, less surface laitance and less bleeding, greatly decreases shrinkage ratio, and improves strength. The adoption of the process can achieve effects of reducing the using amount of cement, improving construction efficiency, and improving the performance of the concrete.

Description

technical field [0001] The invention relates to a construction technique for preparing pavement concrete by adopting a throwing and filling aggregate method. The method is to evenly spread 5-15% coarse aggregate on the lower bearing layer before ordinary concrete construction, then spread the concrete mixture, vibrate and necessary follow-up process, and produce the construction method of pavement concrete. Background technique [0002] The surface layer of cement concrete pavement often has diseases such as laitance and bleeding, which will greatly reduce the wear resistance of the cement concrete pavement, thereby affecting the anti-skid ability of the pavement and affecting driving safety. According to the applicant's analysis, there is a certain amount of slurry in the pavement concrete, but if the amount of cement is reduced, it will also affect the workability of the pavement concrete. When the required slump is reached, a higher water-cement ratio will be required to ...

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Problems solved by technology

[0003] Zhao Shangchuan and others reported that a certain amount of 70-110mm of 70-110mm was thrown into the upper, lower or middle part of the road cement concrete pavement in the title "Experiment and Construction Technology Research of Rippling Cement Concrete Pavement" (Highway 2005, No. 12, P77-80). stone technology, but there is no information on the quantity, this technology is only suitable for low traffic due to the introduction of stones with excessive particle size, which will produce a certain amount of natural defects at the interface between stone and slurry For county and township roads and rural roads, at the same time, throwing stones on the upper or middle part of the road surface will greatly complicate the process, and the surface of the stones will be treated with slurry, which will reduce the construction efficiency and is not suitable for large-scale mechanized construction.

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