【摘 要】
：
With the using of low alkalinity sulfoaluminate cement, the problem of high alkalinity in porous eco-concrete is being solved.But the porous eco-concrete, which was prepared by using sulfoaluminate ce
【机 构】
：
Shandong Provincial Key Lab.of Preparation and Measurement of Building Materials, University of Jina
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
With the using of low alkalinity sulfoaluminate cement, the problem of high alkalinity in porous eco-concrete is being solved.But the porous eco-concrete, which was prepared by using sulfoaluminate cement, doesnt have nutritional components for plants.So, fertilizer was mixed with sulfoaluminate cement to make porous eco-concrete can slowly release fertilizer to plants by hardened cement paste.In this paper, carbamide as fertilizer was mixed with sulfoaluminate cement.X-ray diffraction analysis was used to determine the mineralogical compositions of sulfoaluminate cement hydration products.The isothermal micro heat meter was used to get hydration rate and hydration heat of sulfoaluminate cement.The results show that fludity increased remarkably with the increase of carbamide.the compressive strength of hardened sulfoaluminate cement pastes firstly increases and then decreases with the dosage of carbamide increasing.When the dosage of carbamide reaches 2.0%, the compressive strength of 28d hardened sulfoaluminate cement 2% higher than without carbamide.There is no significant difference in mineralogical compositions of sulfoaluminate cement hydration products.The hydration rate of sulfoaluminate cement becomes lower than without carbamide, and at the same time the setting time becomes longer.The carbamide can increase the porosity of hardened cement paste lightly.
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