Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to high-freezing-resistance fly ash cement and a preparation method thereof, and belongs to the technical field of special building materials. The cement is prepared from the following components in parts by weight: 50 to 80 parts of Portland cement clinker, 20 to 30 parts of fly ash fine aggregate, 0.45 to 0.65 part of basalt fiber, 3.6 to 4.2 parts of antifreezing agent and 6 to 10 parts of fly ash exciting agent, the anti-freezing agent absorbs water from a concrete mixture, under the expansion action and hydration action, sepiolite gradually releases water containing calcium chloride, the freezing point is reduced, and the hydration time is prolonged; calcium chloride is slowly released, so that a large amount of bleeding water is prevented from being collected in the pouring maintenance process to form a continuous ice expansion layer; after water is separated out from the sepiolite, the periphery of the sepiolite is fully hydrated to form a C-S-H reinforced layer with higher strength, the sepiolite is separated out along with the water, the volume of the sepiolite is slightly shrunk, and micropores are formed between the sepiolite and the reinforced layer, so that continuous ice crystals are prevented from being generated, the frost heaving stress is reduced, and a high anti-freezing effect is achieved.
本发明涉及一种高抗冻粉煤灰水泥及其制备方法，属于特种建筑材料技术领域。该水泥按照重量份计包括：硅酸盐水泥熟料50‑80份、粉煤灰细骨料20‑30份、玄武岩纤维0.45‑0.65份、防冻剂3.6‑4.2份和粉煤灰激发剂6‑10份；该防冻剂从混凝土混合料中吸水，在膨胀作用和水化作用下，海泡石逐渐释放出含有氯化钙的水分，降低冰点，延长水化时间；氯化钙缓慢释放，避免浇筑养护过程中大量泌水汇集，形成连续的冰膨胀层；海泡石析出水分后，其周围充分水化，形成强度较高的C‑S‑H强化层，海泡石随着水分析出，体积发生微小收缩，在海泡石和强化层之间形成微气孔，阻碍连续的冰晶产生，降低冻胀应力，达到高抗冻作用。
The invention relates to high-freezing-resistance fly ash cement and a preparation method thereof, and belongs to the technical field of special building materials. The cement is prepared from the following components in parts by weight: 50 to 80 parts of Portland cement clinker, 20 to 30 parts of fly ash fine aggregate, 0.45 to 0.65 part of basalt fiber, 3.6 to 4.2 parts of antifreezing agent and 6 to 10 parts of fly ash exciting agent, the anti-freezing agent absorbs water from a concrete mixture, under the expansion action and hydration action, sepiolite gradually releases water containing calcium chloride, the freezing point is reduced, and the hydration time is prolonged; calcium chloride is slowly released, so that a large amount of bleeding water is prevented from being collected in the pouring maintenance process to form a continuous ice expansion layer; after water is separated out from the sepiolite, the periphery of the sepiolite is fully hydrated to form a C-S-H reinforced layer with higher strength, the sepiolite is separated out along with the water, the volume of the sepiolite is slightly shrunk, and micropores are formed between the sepiolite and the reinforced layer, so that continuous ice crystals are prevented from being generated, the frost heaving stress is reduced, and a high anti-freezing effect is achieved.
本发明涉及一种高抗冻粉煤灰水泥及其制备方法，属于特种建筑材料技术领域。该水泥按照重量份计包括：硅酸盐水泥熟料50‑80份、粉煤灰细骨料20‑30份、玄武岩纤维0.45‑0.65份、防冻剂3.6‑4.2份和粉煤灰激发剂6‑10份；该防冻剂从混凝土混合料中吸水，在膨胀作用和水化作用下，海泡石逐渐释放出含有氯化钙的水分，降低冰点，延长水化时间；氯化钙缓慢释放，避免浇筑养护过程中大量泌水汇集，形成连续的冰膨胀层；海泡石析出水分后，其周围充分水化，形成强度较高的C‑S‑H强化层，海泡石随着水分析出，体积发生微小收缩，在海泡石和强化层之间形成微气孔，阻碍连续的冰晶产生，降低冻胀应力，达到高抗冻作用。
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