METHOD FOR SPRAYING LIGHTWEIGHT CONCRETE

PROBLEM TO BE SOLVED: To provide a method for spraying lightweight concrete in which a rebounding amount of the concrete is small and the fluctuation of the rebounding amount is also small when the moisture content is changed. SOLUTION: Such lightweight concrete is used, as is obtained by blending a...

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Bibliographische Detailangaben
Hauptverfasser:	OGAWA YOJI, OKAMOTO YUKIHISA, TOCHIGI TAKASHI, HIGO YASUHIDE
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS LIME, MAGNESIA METALLURGY MINING REFRACTORIES SHAFTS SLAG TREATMENT OF NATURAL STONE TUNNELS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for spraying lightweight concrete in which a rebounding amount of the concrete is small and the fluctuation of the rebounding amount is also small when the moisture content is changed. SOLUTION: Such lightweight concrete is used, as is obtained by blending artificial lightweight aggregate having 10% or less water-absorptivity, preferably 0.6-1.5 specific gravity in the absolute dry condition and 5.0% or less water- absorptivity, and which has 1.1-2.1 t/m3 air-dried mass per unit volume. The method for spraying lightweight concrete comprises spraying the one obtained by adding a quick settling agent to such lightweight concrete.