| 摘要 |
The invention relates to a composition and method for the production of lightweight structural mortar containing lightweight fillers, a type II synthetic anhydrite and additives, for use in ferrocement construction systems having thermal, acoustic and earthquake-resistance properties and for use as a coating for internal and external roofs and walls, which is intended to be used instead of cement mortars, thereby preventing global warming. Said lightweight structural mortar provides an exceptional replacement for Portland cement mortar and silica and limestone fillers owing to the high dimensional stability thereof, since it does not undergo noticeable expansion or contraction in response to temperature changes, thereby eliminating the appearance of temperature-generated cracks and volume-loss-generated plastic cracks. The composition contains the following components in wt.-%: a) between 80% and 95% type II synthetic anhydrite; b) between 2% and 6% calcium hydroxide; c) between 4% an d 20% lightweight fillers, selected from artificial and/or natural expanded pyroclastic fillers such as pumice teptzil and/or perlite and/or mixtures of same; d) soluble additives comprising between 0.05% and 3% acrylic styrene resins, between 0.03% and 1.5% potassium sulphate and between 0.05% and 2% aluminium sulphate.
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