The effects of metakaolin on mortar compressive strenght a case study of mortar estrich plester
Author(s): Arief Subakti Ariyanto
Abstract: Mortar as a binding material in couple and stucco work has long been known ranging from very simple technologies to more advanced ones. Nowadays mortar technology has developed so rapidly along with the advancement of construction technology. The development of technology in the construction industry has resulted in better product and system innovations so that they are more competitive and applicable. The demands of increasingly complex needs also need to be responded to wisely and made as hopes and opportunities in business development. Ready-mix mortar is perfect for all kinds of work such as normal masonry, light brick, stucco, ceramics, and floor coating. While from the mechanical properties, the compressive strength of the mortar can meet requirements of standard specifications according to the purpose of its use. Ready-made Dry Plaster Mortar is a mixture of fine aggregate with binding material and various additives. The purpose of using additives is to improve the properties of ready-mix plaster dry mortar. One of the additives used is metakaolin. This study aims to determine the effect of metakaolin on compressive strength and cost efficiency of plastering (mortar). The compressive pressure test object measures 50 mm x 50 mm x 50 mm. Compressive strength testing is carried out at the time when the mortar is 7, 14 and 28 days old. The study was conducted with variations in the use of Metakaolin in ostrich mortar plaster products, namely 0%, 5%, 7.5%, 10%, The results showed that a mixture of ready-made plaster dry mortar with the use of methionine 10% of the weight of cement was able to provide a ready-made dry plaster mortar that meet the requirements in ASTM C 91, Standard specification for masonry cement.