11/18/2023 0 Comments Cement plaster specifications![]() ![]() It has low tension and flexural strength so cracks are formed quickly.Ĭ. Requirement of pre-curing and post-curing for supporting hydration reaction.ī. ( Excessive firing may result in spalling of plaster. ASTM C932 Specification for Surface-Applied Bonding Agents for Exterior Plastering 9. ASTM C926 Specification for Application of Portland Cement-Based Plaster 8. It is fire resistive to a certain degree. PORTLAND CEMENT PLASTER PART 1 - GENERAL 1.01 SECTION INCLUDES A. It is resistive towards vegetation growth and chemical actions to a certain degree.Į. It can be used for plastering internal as well as external surfaces.ĭ. It gains maximum efficiency in a short time as compared to lime plaster.Ĭ. This plaster is quite durable and has a closed pore structure that inhibits the circulation of moisture through it.ī. PART I - GENERAL 1.01 SUMMARY: This document is intended to be used in preparing specifications for projects utilizing Commercial Cement Plaster 1 by Dryvit applied to concrete or CMU substrates. Thus prepared plaster is transported to the desired place and is applied to the surface manually or by using plastering pumps.Ī. Transportation and Application of Plaster to the Surfaces The ratio of cement and sand is determined by the required grade of plaster as stated above.Ĭ. Mixing of cement, sand, and water can be done manually or by machine mixing. ~ Water having a PH value between 6 and 8 should be used. The grading limit of sand for cement plaster is given below. ~ Sand having fine grains should be chosen. Commonly PPC cement is used for preparing plaster. ![]() ~ Grade of cement should be chosen based on the requirement. It can be prepared in the following steps:Ī. The main difference is that fine-grained sand is used in cement plaster whereas coarse-grained sand is in cement mortar.Ĭompressive Strength at 28 days (in N/mm 2) The generally used mixed proportion of cement and sand for cement plaster are 1: 4, 1:5, and 1:6.Ĭement plaster is quite similar to cement mortar. PPC cement is commonly used for cement plaster rather than OPC cement. The blended form of cement, sand, and water in definite proportion is cement plaster. In this article, we will discuss cement plaster. Plaster is a protective or decorative coat that is applied on walls, ceilings, floors, etc to protect them against weathering actions, chemicals, fungus, etc, and also to achieve a smooth surface.Ĭommonly lime plaster and cement plaster are used in plastering work. ![]()
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