【摘 要】
：
The mechanical properties of cement paste containing waste paper fibers were investigated.The hydration degree and pore characteristic of cement paste were tested with TG-DSC (thermogravimetry-differe
【机 构】
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Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Sh
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
The mechanical properties of cement paste containing waste paper fibers were investigated.The hydration degree and pore characteristic of cement paste were tested with TG-DSC (thermogravimetry-differential scanning calorimetry) and BET (the nitrogen adsorption static capacity method), respectively.Results show that waste paper fibers can obviously decrease the compressive strength/flexural strength ratio of cement paste although there is not improve the flexural strength, leading to the deerease of the b()ottleness and increase of the toughness.In addition, wet mixing addition of waste paper fibers in cement paste is more effect on improving the toughness of cement paste than other ways.Under a water/cement ratio of 0.25, the pore structure of cement paste containing fibers can be more improved than that of paste without fibers.The flexural strength,compression strength and porosity vary with the addition amount of waste paper fibers, the content of hydration products of paste reaches to the highest and the pore volume of 2~ 50 nm reaches to the lowest level when the addition amount is 0.2% by mass of cement.Under the maximum addition amount, the properties of cement paste can be improved.
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