Impact of Gypsum Addition on Portland Composite Cement (PCC) | Chapter 7 | Research Aspects in Chemical and Materials Sciences Vol. 1

 In Portland Composite Cement, gypsum can be used instead of clinker. It influences the compressive strength of cement by modulating the hydration reaction speed in order to get the best compressive strength possible. Furthermore, it delays both the early and ultimate hardening of the cement. Other materials, such as trass, are also employed in this study that were not before examined. It is a volcanic ash-derived soft rock or soil layer. Pozzolana is a kind of limestone that may be added in cement formulations to boost compressive strength. The goal of this study is to see how gypsum affects the quality of Portland Composite Cement, such as compressive strength, setting time, and SO3 concentration. They looked at clinker properties by mixing in some gypsum that had already been used in previous research. The impact of the SO3 concentration generated by the addition of gypsum, on the other hand, requires further investigation. The samples were made with varying amounts of gypsum, ranging from 0 to 5%. As for the remaining components, the clinker ratio was set at 75%, while limestone and trass were added at a constant ratio of 1.2. The fineness factor is kept in the range of 3850 50 cm2/gr as a controlled variable. At the ages of 1, 3, 7, and 28 days, the effect of adding gypsum to clinker was determined using a mortar compressive strength test and the binding time. The results reveal that adding 3.5 percent gypsum to a 28-day cure binder increased the attributes of PCC: compressive strength of 348 kg/cm2, SO3 concentration of 1.7 percent, initial setting time of ≥ 90 minutes, and final setting time of 375 minutes.

Author(s) Details:

Herliati Rahman,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

Anggi Sagitha,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

A. Dyah Puspita,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

R. Puput Dwi,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

Akhirudin Salasa,
Department of Chemical Engineering, Faculty of Industrial Technology, Jayabaya University, Jalan Raya Bogor km.28,8 Cimanggis Jakarta Timur, Indonesia.

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