Compound type elasticity reducing agent, preparation method thereof and sprayed concrete

• Main Authors: HE XINXIN, LI YONGLIANG, LIU JUNYUAN, CAO JIARUI, ZHA YANPENG, WEI CHUANJIANG, LI WENXIU, KONG TAO, WANG ZILONG, WU HAO, WU XINJIANG, ZHOU CHUXIONG, JI YE, WANG JING, LI DEJUN, HU CHAOLONG
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to the technical field of concrete admixtures, and particularly discloses a composite elasticity reducing agent, a preparation method thereof and sprayed concrete. The composite elasticity reducing agent comprises the following components in percentage by weight: 10-25% of a polycarboxylic acid water reducing agent; 0-0.09% of an air entraining agent; 0.06% to 0.18% of a tackifier; 5-20% of a coagulation accelerating early strength agent; and 0.5-2% of a waterproof agent. When the composite type elasticity reducing agent is used for preparing sprayed concrete, through detection, after the composite type elasticity reducing agent is added, the 1d compressive strength of the obtained sprayed concrete is improved by 35.2% or above, the 28d compressive strength is improved by 29.9% or above, the rebound rate is reduced by 59.1% or above, and the effect is remarkable. 本申请涉及混凝土外加剂的技术领域，具体公开了一种复合型减弹剂及其制备方法和喷射混凝土。所述复合型减弹剂按重量百分比计，包括聚羧酸减水剂10-25%；引气剂0-0.09%；增粘剂0.06-0.18%；促凝早强剂5-20%；防水剂0.5-2%。将本申请所得