| 摘要 |
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 |
