Study of Isolation Methods of Underground Structures By using Concrete Admixtures
A. A. Elsayed

A.A. Elsayed, Associate Professor, Department of Civil Engineering, Modern Academy for Engineering and Technology, Cairo, Egypt.
Manuscript received on 15 October 2015 | Revised Manuscript received on 25 October 2015 | Manuscript Published on 30 October 2015 | PP: 127-131 | Volume-5 Issue-1, October 2015 | Retrieval Number: A4315105115/15©BEIESP
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Abstract: – Waterproofing of underground structures is frequently a problem and a range of solutions have been tried in the last two decades. Dominating the market are PVC and HDPE (high density poly ethylene) sheet membranes, but recently the alternative, is concrete admixtures for water permeability reducing and so that use in concrete isolation (waterproofing), the longevity of a concrete structure is influenced by the permeability of the concrete. The main objectives of the research are to study the mechanical properties of concrete and the improvement these properties by adding waterproofing using various mount percentages and two types of waterproofing (ADDICRETE DM2-PLASTOCRET-N) series of experimental studies were carried out on plain concrete with added, ADDICRETE DM2 and PLASTOCRETE-N in order to investigate their properties and influence on the water permeability of concrete. In this study, it has been addition ADDICRETE DM2 and PLASTOCRETE N to the mixture by difference ratio. 1%, 0.5%, 0.45% ,0.35% of cement weight, constant ratio from , sand, gravel, cement and water W/C equal to 0.45 in all tests that used in the research . The study of these tests by measuring the permeability of concrete specimens prepared in the laboratory. Many tests were carried out and the results were presented.
Keywords: Waterproofing; ADDICRETE DM2, PLASTOCRETE-N, Permeability, Concrete.

Scope of the Article: Concrete Engineering