Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Shotcrete springback inhibitor and using method thereof
The invention discloses a shotcrete springback inhibitor and a using method thereof. The springback inhibitor is prepared by mixing the following raw materials: 50%-60% of a composite admixture, 15%-30% of nano calcium silicate, 15%-25% of an efficient water reducing agent, 1%-5% of redispersible latex powder, 1%-5% of a water retaining agent, 1%-5% of a thickening agent and 0.5%-1.0% of an exciting agent. When shotcrete is prepared, cement, sand, stone and the springback inhibitor are added into a stirrer together to be stirred; the mixing amount of the springback inhibitor is 3-8% of the total consumption of the cementing material. According to the shotcrete springback inhibitor and the using method thereof of the invention, under the condition that a water reducing agent is not added and the mixing amount of an accelerator is reduced, the springback rate of the shotcrete is greatly reduced, the working performance of the shotcrete is improved, meanwhile, the mechanical property andthe durability are improved. The method is particularly suitable for preparing the high-performance shotcrete. The one-time spraying thickness of the shotcrete can reach 50 cm or above, the early strength of the shotcrete is remarkably improved, the adverse effects of the accelerator on the strength, durability and the like of the shotcrete are avoided, the construction efficiency is improved, andthe engineering cost is saved.
一种喷射混凝土回弹抑制剂及其使用方法，回弹抑制剂是由下述原料混合而成的：复合掺合料50％～60％，纳米硅酸钙15％～30％，高效减水剂15％～25％，可再分散乳胶粉1％～5％，保水剂1％～5％，增稠剂1％～5％，激发剂0.5％～1.0％。在制备喷射混凝土时，将水泥、砂、石、回弹抑制剂一同加入搅拌机中搅拌，其掺量为胶凝材料总用量的3％～8％。本发明可在不添加减水剂和降低速凝剂掺量的情况下，大大降低喷射混凝土回弹率，改善喷射混凝土的工作性能，同时提高力学性能和耐久性能，特别适用于高性能喷射混凝土的制备。一次喷射厚度可达50cm以上，早期强度显著提高，避免了速凝剂对强度和耐久性等的不利影响，提高了施工效率，节约了工程成本。
Shotcrete springback inhibitor and using method thereof
The invention discloses a shotcrete springback inhibitor and a using method thereof. The springback inhibitor is prepared by mixing the following raw materials: 50%-60% of a composite admixture, 15%-30% of nano calcium silicate, 15%-25% of an efficient water reducing agent, 1%-5% of redispersible latex powder, 1%-5% of a water retaining agent, 1%-5% of a thickening agent and 0.5%-1.0% of an exciting agent. When shotcrete is prepared, cement, sand, stone and the springback inhibitor are added into a stirrer together to be stirred; the mixing amount of the springback inhibitor is 3-8% of the total consumption of the cementing material. According to the shotcrete springback inhibitor and the using method thereof of the invention, under the condition that a water reducing agent is not added and the mixing amount of an accelerator is reduced, the springback rate of the shotcrete is greatly reduced, the working performance of the shotcrete is improved, meanwhile, the mechanical property andthe durability are improved. The method is particularly suitable for preparing the high-performance shotcrete. The one-time spraying thickness of the shotcrete can reach 50 cm or above, the early strength of the shotcrete is remarkably improved, the adverse effects of the accelerator on the strength, durability and the like of the shotcrete are avoided, the construction efficiency is improved, andthe engineering cost is saved.
一种喷射混凝土回弹抑制剂及其使用方法，回弹抑制剂是由下述原料混合而成的：复合掺合料50％～60％，纳米硅酸钙15％～30％，高效减水剂15％～25％，可再分散乳胶粉1％～5％，保水剂1％～5％，增稠剂1％～5％，激发剂0.5％～1.0％。在制备喷射混凝土时，将水泥、砂、石、回弹抑制剂一同加入搅拌机中搅拌，其掺量为胶凝材料总用量的3％～8％。本发明可在不添加减水剂和降低速凝剂掺量的情况下，大大降低喷射混凝土回弹率，改善喷射混凝土的工作性能，同时提高力学性能和耐久性能，特别适用于高性能喷射混凝土的制备。一次喷射厚度可达50cm以上，早期强度显著提高，避免了速凝剂对强度和耐久性等的不利影响，提高了施工效率，节约了工程成本。
Shotcrete springback inhibitor and using method thereof
一种喷射混凝土回弹抑制剂及其使用方法
ZHAO MINGMIN (Autor:in) / JIA ERPENG (Autor:in) / WANG YONGMEI (Autor:in) / LIU ZHAOYANG (Autor:in) / TIAN XIANWEN (Autor:in) / LI QIANQIAN (Autor:in) / LIU CUIFEN (Autor:in)
27.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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