Abstract:
PURPOSE: A highly intensifying shotcrete composition is provided to have high intensity and constructability by comprising inorganic nano anionic synthetic clay, HPA including calcium sulfo-aluminate and superplasticizer. CONSTITUTION: A highly intensifying shotcrete composition comprises 450-500kg/m^3 of cement, 20-30kg/m^3 of HPA and 5-8kg/m^3 of water reducing agent. The HPA comprises 0.1-5.0 parts by weight% of HT(inorganic nano anionic synthetic clay), 0.1-5.0 parts by weight% of calcium sulfoaluminate, 35-50 parts by weight% of silica fume, 35-50 parts by weight% of flyash and 0.1-7 parts by weight of anhydrous gypsum. In the highly intensifying shotcrete composition, water-binder(W/B) is 35-40 parts by weight% and fine aggregate moduls (S/a) is 55-65 parts by weight % and the maximum size of thick aggregate is below 13mm. The highly intensifying shotcrete composition comprises 35-45kg/m^3 of steel fiber. The HPA comprises 0.1-1.0 parts by weight % of water reducing agent and 0.01-0.1 parts by weight% of thickening agent. [Reference numerals] (AA) Formation of hydrate combination between particles; (BB) Organic nanoparticles; (CC) Hydration gel; (DD) Cement
Abstract translation:目的:通过包括无机纳米阴离子合成粘土,包括硫铝酸钙和超增塑剂的HPA,提供了一种高度强化的喷浆混合物组合物,具有高强度和可施工性。 构成:高强度喷浆混合料组成包括水泥450-500kg / m 3,HPA 20-30kg / m 3,减水剂5-8kg / m 3。 HPA包含0.1-5.0重量%的HT(无机纳米阴离子合成粘土),0.1-5.0重量百分比的硫铝酸钙,35-50重量%的硅灰,35-50重量份的 粉煤灰和0.1-7重量份无水石膏。 在高强度喷射混凝土组合物中,水粘合剂(W / B)为35-40重量%,细聚集体模量(S / a)为55-65重量份%,厚骨料的最大尺寸低于13mm 。 高强度喷射混凝土组成包括35-45kg / m 3的钢纤维。 HPA包含0.1-1.0重量%的减水剂和0.01-0.1重量%的增稠剂。 (附图标记)(AA)颗粒之间的水合物组合的形成; (BB)有机纳米粒子; (CC)水合凝胶; (DD)水泥
Abstract:
PURPOSE: A sealing packer for a rock bolt filler using a foaming material, a sealing method of a rock bolt hole using such a sealing packer, and a constructing method of a rock bolt are provided to prevent a rock bolt from falling due to own weight since when the rock bolt is installed on a installation hole for installing the rock bolt after the hole is formed on the ground, the rock bolt is stably supported. CONSTITUTION: A sealing packer for a rock bolt filler using a foaming material comprises a packer body, a first foaming agent and a second foaming agent. The synthetic-resin coated aluminum foils of the front and rear sides of the packer body are thermally-bonded to form an inner space. The inner space of the packer body is divided into two areas by an inner partition line(22), which is formed by the thermal bonding. The first foaming agent and the second foaming agent are respectively filled in the two areas of the inner space of the packer body. The first and second foaming agents are mixed and form a foaming body.
Abstract:
PURPOSE: A high-performance admixture composition and shotcrete including thereof are provided to economically produce the shotcrete by decreasing the usage of metakaolin and using silica fume instead. CONSTITUTION: A high-performance admixture composition for improving the intensity and the durability of shotcrete contains 5~20wt% of metakaolin, 5~20wt% of calcium sulfoaluminate, 20~45wt% of anhydrous gypsum, and 30~50wt% of fly ash. The composition additionally contains 0.05~1wt% of water reducing agent or 0.01~0.1wt% of thickening agent.