The Self Compacting Concrete (Scc) Using Seawater as Mixing Water Without Curing

Abstract

The number of problems found in the construction world include the difficulty or lack of fresh water in some areas to be mixed in the concrete, negligence in the maintenance of concrete and working process of concrete mainly on the concrete structures have a complex reinforcement and high concrete building structures. This study aims to find out the compressive strength, splitting tensile strength, absorption, and porosity of Self Compacting Concrete (SCC) using sea water as mixing water and with or without curing in sea water. The test specimens were made for each test specimen with the variation on age 1 day, 3 days, 7 days, 28 days and 90 days. The test method of compressive strength according to ASTM 39/C 39M-12a standard, tensile strength according to ASTM C496 / C496M-11 standard and the porosity and absorption according to ASTM C642-13 standard. The result of research was 1) the decrease in compressive strength in the specimen SCC-SWC was from 3 days, 7 days, 28 days and 90 days consecutive 13.20%, 12.90%, 12.80%, and 12.50%; 2) the decreases in splitting tensile strength in the specimen SCC-SWC were from the age of 3 days, 7 days, 28 days until the age of 90 days consecutive by 3.10%, 8.05%, 9.51%, and 9.21%; 3) the increase in the porosity values on the specimen SCC seawater without cured in sea water (SCC-SWC) at age 3 days, 7 days, 28 days and 90 days was 2.86%, 7.90%, 5.86%, and 5.55%, respectively; 4) the increase in the absorption values on the specimen SCC without curing at 3 days, 7 days, 28 days and 90 days was 15.80%, 20.57%, 15.84%, and 30.80%, respectively. The increase in mechanical properties (compressive strength and tensile strength) in the both of the specimen SCC-SC and SCC-SWC along with the decrease of porosity and absorption. Conversely, the decrease of compressive strength and tensile strength in the both of the specimen SCC-SC and SCC-SWC along with the increase in porosity and absorption value in the SCC.

Potency of Sugarcane Bagasse Ash Partial Subtitution of Cement in Concrete

“…The results showed that the addition of 10% and 20% bagasse ash caused a slight decrease in the workability of mortar but increased long-term microstructure and compressive strength [6]. As with research by Erniati's et all that the strength of concrete is very significant with porosity and concrete microstructure, where concrete strength and microstructure increase with smaller porosity values [7,8,10].…”

“…The compressive strength of concrete is very significant with its porosity and microstructure [7,8]. The higher the concrete compressive strength, the smaller the porosity value [8,10].…”

Potency Of Sugarcane Bagasse Ash Partial Substitution Of Cement In Concrete

“…The results showed that the addition of 10% and 20% bagasse ash caused a slight decrease in the workability of mortar but increased long-term microstructure and compressive strength [6]. As with research by Erniati's et all that the strength of concrete is very significant with porosity and concrete microstructure, where concrete strength and microstructure increase with smaller porosity values [7,8,10].…”

“…The compressive strength of concrete is very significant with its porosity and microstructure [7,8]. The higher the concrete compressive strength, the smaller the porosity value [8,10].…”