【摘 要】
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Magnesium phosphate based cements are rapid setting have high early strength.To prolong the setting time,retarding additives are often used in magnesium pho
【机 构】
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School of Civil Engineering, Shenzhen University
【出 处】
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The 14th International Congress on the Chemistry of Cement (
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Magnesium phosphate based cements are rapid setting have high early strength.To prolong the setting time,retarding additives are often used in magnesium phosphate cements.In the present paper, the magnesium phosphate cement (MPC) consists of magnesia, potassium phosphate and fly ash with different retarders were investigated.Effect of different additives, sodium tripolyphosphate (ST), borax (NB) and boric acid (BA) on the early hydration and properties of MPC were examined, including the setting time, temperature rise during initial hydration, strength and electrical conductivity development.Hydration products of MPC paste were analyzed by X-ray diffraction (XRD), and the morphology of early hydrates was observed by scanning electron microscopy (SEM).
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