The Environmentally Substitution of Shellfish Shells on the Strength of Concrete

EasyChair Preprint 9350

Abstract

The research was conducted to determine the effect of the use of shellfish shells on the compressive strength of concrete. The maximum diameter of the aggregate used is 19 mm, and the cement used is Portland cement type I. The concrete mix design used the American Concrete Institute (ACI) method with a slump design of 75-100 mm. The test object used was a cylinder with a diameter of 15 cm and a height of 30 cm. The variations in the use of shellfish shell powder were 0%, 2%, 4%, 6%, and 8%, and 0% shellfish shell powder is a comparison test object. For each variation of shell powder, 3 (three) cylindrical specimens were made with test times of 7 and 28 days. The test results show that for the split tensile strength of concrete at 28 days of concrete age with a variable of 2% and compressive strength of a variation of 4%. The addition of 2% clamshell powder can increase the split tensile strength of normal concrete by 10.48%, and an increase in concrete compressive strength of 21.98% in the substitution of 6% shell powder. The novelty obtained from this research is the use of shell powder with 6% substitution to replace cement, which produces a significant concrete compressive strength, namely 0% shellfish powder has a compressive strength of 26.610 MPa compared to 6% substitution, which has a strength of 32.460 MPa.

Keyphrases: Portland cement substitution, Shellfish shell Powder, concrete strength

@booklet{EasyChair:9350,
  author    = {Andi Yusra and Samsunan Samsunan and Muhammad Faisi Ikhwali and Andrisman Satria and Veranita},
  title     = {The Environmentally Substitution of Shellfish Shells on the Strength of Concrete},
  howpublished = {EasyChair Preprint 9350},
  year      = {EasyChair, 2022}}