The Producing And Properties Studing Of Lighweight And High Strongth Concrete Applied In Bridge Pavement

In this paper, the choice of raw materials for concrete LC40, with the systematic study design to performance ratio study materials for the bridge road performance, crack resistance and construction of operational performance was also discussed in detail by.By studying the shale type, grain type, size, pre-wet processing, additives type, and other factors affecting fiber into concrete work and homogeneity of discovery: the particle size of not more than 20 mm gravel shale Tao tablets, more than 72 hours after the pre-wet processing, can achieve better workability, its concrete dividing the value of K controls within 6%. Can better suppress aggregate floating and stratification, but also conducive to pumping.Secondly, through the ceramic type, pre-wet period, the volume ratio of sand and concrete admixtures factors affecting the performance of the test was found: the preparation of high strength lightweight concrete cylinder compressive strength must be greater than 6.0MPa of gravel-type ceramic; Pre-wet time exceeds 72 hours, the compressive strength, flexural strength, elastic modulus sharpest increase; the volume of sand is an important factor affecting the rate of dry bulk density and strength of concrete, when a balance between strength and apparent density, should select the appropriate volume of sand ratio by volume of sand was found generally the best rate in the vicinity of 42%. Specific projects should be experimentally determined.Again, the test for chloride ion permeability of concrete carbonation properties and wear resistance test analysis found: 1h pre-wet concrete electric flux maximum, 28 d reaches 2986C; greater impact on the depth of carbonation of fly ash, light quality high-strength concrete with fly ash incorporation, its carbonation depth has increased, but more than 15% of fly ash, the carbonation depth increases, carbonation resistance is significantly reduced.Crack resistance test is crucial as lightweight concrete deck pavement material found by experiment: Pre-wet processing time is longer than 24 hours later, the concrete surface can be a good early prevention of contraction of the concrete cracks. By relying on the test section and repeated construction project, summed up a more perfect lightweight, high strength concrete bridge deck construction technical performance.