LIGHTWEIGHT CONCRETE PRODUCTION BY GYPSUM FROM WASTE MATERIALS OF CLAMSHELL AND EGGSHELL

Ni'mah, Lailan LIGHTWEIGHT CONCRETE PRODUCTION BY GYPSUM FROM WASTE MATERIALS OF CLAMSHELL AND EGGSHELL. LIGHTWEIGHT CONCRETE PRODUCTION BY GYPSUM FROM WASTE MATERIALS OF CLAMSHELL AND EGGSHELL.

[img]
Preview
Text
Lailan_Nimah_JAEBS-2382-9.pdf

Download (177Kb) | Preview
Official URL: http://www.textroad.com/pdf/JAEBS/J. Appl. Environ...

Abstract

ABSTRACT Lightweight concrete is the most widely used in civil construction material. Lightweight concrete has a lighter volume weight and lower density. To form a lightweight concrete required the addition of gypsum. This research is done by calcination process with the material used is shell and egg shell waste in order to get the best composition from CaO as gypsum composer in making light concrete. CaO can be produced from the decomposition of CaCO3 contained in the shells and egg shells. The process for obtaining CaO is shell waste and washed eggshell, dried with oven at 100ºC for 2 hours, then mashed with and sieved to reach 355 micron size. 500 grams of shell waste and eggshells were calcined at 900ºC for 6 hours using furnace. In the calcination process will be obtained CaCO3 to be reacted with H2SO4 and H2O to form gypsum. Gypsum is used as a raw material in the manufacture of lightweight concrete. The obtained gypsum was analyzed by SEM (Scanning Electron Microscope) test to observe the material surface and XRD (X-Ray Difraction) for analyzed mineral structure. For making gypsum done by mixing eggshells, clamshell, H2SO4, H2O with variation 40: 0: 20: 40; 30: 10: 20: 40; 20: 20: 20: 40; 10: 30: 20: 40; and 0: 40: 20: 40. To obtain lightweight concrete is done by mixing gypsum, white cement, styrofoam and H2O with variation of 30: 15: 5: 50: 30. The results obtained were the best composition of gypsum composition of eggshell and eggshell in the BRG3 samples with ratio of 20% eggshell, 20% clamshell, 20% sulfuric acid and 40% H2O result 269.9 gram from mass total 450 grams. For the best composition of lightweight concrete made from gypsum raw is found in BRG3 sample with water absorption of 5.08% and compressive strength 16.840 kg / cm2. Seangkan, the smallest water absorption is in variable 1 of 2.18%. The result of SEM analysis for the best gypsum structure is found in gypsum 3. XRD analysis shows that gypsum contains CaSO4.H2O; CaSO4; CaO; SiO2; and MgO. KEYWORDS: Gypsum, lightweight concrete, clamshell, eggshell, compressive strength, water absorption.

Item Type: Article
Subjects: A General Works > AI Indexes (General)
Depositing User: Mr Arief Mirathan
Date Deposited: 27 Mar 2018 02:41
Last Modified: 27 Mar 2018 02:41
URI: http://eprints.ulm.ac.id/id/eprint/3135

Actions (login required)

View Item View Item