Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength super-retarding concrete and preparation process thereof
According to the high-strength super-retarding concrete and the preparation process thereof, along with the addition of a water reducing agent and a combination agent, under the mutual contact of a polycarboxylic acid high-performance water reducing agent, borax, sugar calcium, sodium bicarbonate and pyridoxol phosphoric acid, due to the fact that the polycarboxylic acid high-performance water reducing agent has a very strong chelation effect on Ca < 2 + > and Al < 3 + > in cement, through chelation, the high-strength super-retarding concrete can be formed; according to the invention, calcium sulfate and aluminum sulfate are used as raw materials, the ion concentration of Ca < 2 + > and Al < 3 + > in a cement slurry phase is reduced, so that the hydration process of cement is delayed, after ardealite is synchronously matched and dissolved, polysulfide type hydrated calcium sulfate aluminate ettringite is generated under the condition that the amount of gypsum is enough and can be attached to the surfaces of clinker particles, so that a channel capable of enabling water vapor to escape from a boundary area is formed, and the air pressure is reduced; and in this way, the double retarding effect can be achieved under the cooperation with the retarder, the appropriate retarding effect can be achieved while the using amount of the retarder can be effectively controlled, and the good high-temperature-resistant and fireproof capacity is improved in a matched mode.
本发明公开了一种高强度超缓凝混凝土及其制备工艺，随着减水剂和组合剂的放入，其聚羧酸高性能减水剂、硼砂、糖钙、碳酸氢钠和吡哆醇磷酸之间的相互接触下，由于聚羧酸高性能减水剂对水泥中的Ca2+、Al3+具有很强的螯合作用，通过螯合，减少了水泥浆液相中的Ca2+、Al3+的离子浓度，从而延缓水泥的水化过程，同步的配合磷石膏溶解后，在石膏量足够的情况下生成多硫型水化硫铝酸钙钙矾石，会附着在熟料颗粒表面，使其形成能使水气从边界区逸出的通道，减小了气压，从而防止柱的保护层剥落，这种方式能够与缓凝剂配合下起到双重缓凝的效果，使其能够有效控制缓凝剂用量的同时达到合适的缓凝效果，且配合提升良好的抗高温防火的能力。
High-strength super-retarding concrete and preparation process thereof
According to the high-strength super-retarding concrete and the preparation process thereof, along with the addition of a water reducing agent and a combination agent, under the mutual contact of a polycarboxylic acid high-performance water reducing agent, borax, sugar calcium, sodium bicarbonate and pyridoxol phosphoric acid, due to the fact that the polycarboxylic acid high-performance water reducing agent has a very strong chelation effect on Ca < 2 + > and Al < 3 + > in cement, through chelation, the high-strength super-retarding concrete can be formed; according to the invention, calcium sulfate and aluminum sulfate are used as raw materials, the ion concentration of Ca < 2 + > and Al < 3 + > in a cement slurry phase is reduced, so that the hydration process of cement is delayed, after ardealite is synchronously matched and dissolved, polysulfide type hydrated calcium sulfate aluminate ettringite is generated under the condition that the amount of gypsum is enough and can be attached to the surfaces of clinker particles, so that a channel capable of enabling water vapor to escape from a boundary area is formed, and the air pressure is reduced; and in this way, the double retarding effect can be achieved under the cooperation with the retarder, the appropriate retarding effect can be achieved while the using amount of the retarder can be effectively controlled, and the good high-temperature-resistant and fireproof capacity is improved in a matched mode.
本发明公开了一种高强度超缓凝混凝土及其制备工艺，随着减水剂和组合剂的放入，其聚羧酸高性能减水剂、硼砂、糖钙、碳酸氢钠和吡哆醇磷酸之间的相互接触下，由于聚羧酸高性能减水剂对水泥中的Ca2+、Al3+具有很强的螯合作用，通过螯合，减少了水泥浆液相中的Ca2+、Al3+的离子浓度，从而延缓水泥的水化过程，同步的配合磷石膏溶解后，在石膏量足够的情况下生成多硫型水化硫铝酸钙钙矾石，会附着在熟料颗粒表面，使其形成能使水气从边界区逸出的通道，减小了气压，从而防止柱的保护层剥落，这种方式能够与缓凝剂配合下起到双重缓凝的效果，使其能够有效控制缓凝剂用量的同时达到合适的缓凝效果，且配合提升良好的抗高温防火的能力。
High-strength super-retarding concrete and preparation process thereof
一种高强度超缓凝混凝土及其制备工艺
YANG FENGLIN (Autor:in) / SHENG LIN (Autor:in) / TANG XIAOFENG (Autor:in)
17.03.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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