EFFECT OF DIFFERENCES IN ORDINARY PORTLAND CEMENT TYPE CHARACTERISTICS OF CEMENT (OPC) AND PORTLAND COMPOSITE CEMENT (PPC) ON THE STRENGTH OF MOTAR

The more rapid growth of cement industry in Indonesia emerged several types of cement such as OPC (Ordinary Portland Cement), White Cement and most recently was the PCC (Portland Composite Cement). Cement PCC (Portland Composite Cement) is a new variant of cement types that have characteristics similar to Portland cement in general but this type of cement has a better quality, environmentally friendly and have a more economical price. PCC cement raw material composition is Clinker, gypsum and additives. Additive materials used are limestone, fly ash and Trass. Unlike OPC type that does not use additives Fly Ash and Trass. In type PCC uses additional additives Fly Ash and Trass where there SiO2 compounds that can increase the compressive strength. Besides the existence of additive Fly Ash and Trass. At PCC Lime Stone also added that works to increase the compressive strength on compressive strength three days. One of the physical properties of cement to be tested by a standard is a robust press mortar (ie a mixture of cement, sand and water standards), the results of its examination, expressed as the price strength of mortar or in other words to examine the quality of cement bonding power. To be able to find out more about the different characteristics of each type of cement, such research has been done by the brother of Annissa Rini in the year 2006 About the relationship between the addition of Lime Stone of% residue on cement materials PCC (Portland Composite Cement) we need to hold further research on the effect of different characteristics of cement type Ordinary Portland Cement with Composite Portland Cement type of compressive strength in mortar with the optimization of the addition of fly ash and additives on the quality of cement Trass PCC (Portland Composite Cement).