Experimental Research On Basic Properties Of Inorganic Polymer Concrete Full-scale Slab

Inorganic polymer material that is a kind of new building material, since it has low energy consumption, little environmental pollution, rapid hardening and high strength etc, proved to be the hot issue studying by the domestic and foreign engineering. Based on the inorganic polymer concrete full-scale slab, together with plentiful tests and theoretical analysis, the inorganic polymer materials are applied to road surface engineering for the first time in this paper. Then its basic mechanical properties, carbonation resistance and temperature changing at the molding stage have been experiment research and theoretical analysis from microeconomic perspective and finite element. Its main research work and the important achievements obtained as follows:1. Research and analysis about samples drilled from the inorganic polymer concrete full-scale slab at the different conservation periods in mechanical properties, results show that: the compression strength and flexural-tensile strength of drilling samples reach the highway pavement design index, in addition the two different strengths both grow dramatically at the earlier stage and increase pretty slowly at the later stage. This shows the well early strength of inorganic polymer materials.2. Research and analysis about SEM on samples destroyed by compression test and flexural tensile test, results show that: the pore space and unreacted fly ash exist in inorganic polymer concrete, and this cause the strength development restricted at certain extent; there is not obvious interface transition zone between aggregate and gelled material, and the cracks does not found at the interface transition zone after samples have been damaged. This shows the gelled system, made up by alkali-activator, fly ash and mineral powder, has high cohesive strength and well gelling property.3. The carbonization depth of inorganic polymer concrete constantly grows with the increase of carbonization time, and its carbonization depths are greater than the one of common concrete, in the meantime the both of carbonization depths fit Fick’s first law of diffusion; due to the influence of hoop effect, the compression strength of samples have been improved after samples are carbonization, but the flexural-tensile strength have not obvious change.4. Inspecting and analyzing temperatures during pouring and maintenance stages of the inorganic polymer concrete full-scale slab, results show that: the temperature curves are fluctuant acuteness in the two hours after pouring and the curves have obviously increasing trend in the four days after pouring; then the temperature of full-scale slab stay at stable value after four days.5. Finite element analysis models of the inorganic polymer concrete full-scale slab are set up. Under the traffic load and temperature variation, the bending stress of pavement slab is studied, with consideration of different slab length, slab thickness and elastic module of the concrete. The analysis results have important significance on the application of inorganic polymer concrete to highway engineering.