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The bonding mechanism between straw and concrete was analyzed through testing the compressive strength and flexural strength of hollow block, with different straw amount and different dosage and types of admixtures. The test results show that the mechanical properties of hollow blocks reduced after adding straws, and the more straws was added, the more hollow block density decreased. But adding Al2(SO4)3 and CaCl2 could improve the dense degree between rice straw and concrete. And when the proportion of straw mixing amount was 10%, the flexural strength of the early strength agent (2% Al(SO4)3 , CaCl2 ) added hollow block reached as maximal as 3.1 MPa, while the compressive strength was 9.1 MPa, consisting with the strength grade of common concrete hollow block MU7.5.
The bonding mechanism between straw and concrete was finished through testing the compressive strength and flexural strength of hollow blocks, with different straw amount and different dosage and types of admixtures. The test results show that the mechanical properties of hollow blocks reduced after adding straws, and The more straws was added, the more hollow block density decreased. But adding Al2 (SO4) 3 and CaCl2 could improve the dense degree between rice straw and concrete. And when the proportion of straw mixing amount was 10%, the flexural strength of the Early strength agent (2% Al (SO4) 3, CaCl2) added hollow block reached as maximal as 3.1 MPa while compressive strength was 9.1 MPa, consisting with the strength grade of common concrete hollow block MU7.5.