Experimental Study On Dynamic Compression Performance Of Inorganic Polymer Steel Fiber Reinforced Concrete

Inorganic polymer concrete as a new green building material, because of theirlow cost price, less environmental pollution, radiation resistance, good permeabilityand rapid hardening early strength and other characteristics, has been the concern ofmany scholars. However, inorganic polymer concrete（IPC）often showed greatfragility in force process, usually by adding fiber to inorganic polymer concrete toimprove its toughness. This article added steel fiber to inorganic polymer concrete tostudy the mechanical properties of the impact load, the main research work andachievements include the following aspects:1. Cube static compressive experimental study of inorganic polymers steel fiberreinforced concrete（IPSFRC） and IPC were proceed. Studies have shown that:IPSFRC is slightly higher than the intensity of IPC with respect to the latter by about7%; On the failure patterns, IPC surface was peeling and had certain micro-cracks,however IPC flaking serious.2. Through the dynamic compression tests on the split Hopkinson pressure bar(SHPB) device of IPSFRC, IPC as well as ordinary steel fiber reinforced concrete（SFRC）, getting three kinds of materials under different strain rates of stress-straincurves, and organize by the failure patterns of the material at different strain rates.3. From the main mechanical parameters of failure stress, peak strain, peaktoughness analysis the influence of strain rate to dynamic compression IPSFRC. Withthe increase of strain rate, failure stress, peak strain, peak toughness of inorganicpolymers steel fiber reinforced concrete also will increase the peak strain, clearlyreflected sensitive for strain rate. In terms of the dynamic compressive mechanicalproperties, IPSFRC is significantly better than IPC.4. The dynamic material properties of IPSFRC and SFRC with the same contentof steel fiber are compared with each other peak, The result shows that the dynamicstrength and toughness of IPSFRC is better than that of SFRC, but without overallgood failure patterns.5A finite element model was built for SHPB test by using ANSYS/LS-DYNAsoftware to simulate this test, the stress-strain curves in different strain rates was reconstructed using the extracted the incident waves and transmitted waves by using“two-wave method”. And results show that the numerical simulations are accordantwith the testing result. Simultaneously, damage models of the test specimen indifferent time are obtained and analysis reasons that IPSFRC under different strainrates have different failure patterns.