Garuda - Garba Rujukan Digital

Elhusna, Elhusna

Unknown Affiliation

Author-ID : 1208959

Civil Engineering, Building, Construction & Architecture

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PENGARUH PENAMBAHAN FLY ASH DAN KONDISI ADUKAN TANAH LIAT TERHADAP KUAT TEKAN BATA MERAH Astriani, Nelly; Elhusna, Elhusna; Wahyuni, Ade Sri
Inersia: Jurnal Teknik Sipil Vol. 9 No. 2 (2017)
Publisher : Universitas Bengkulu

This article describes the research result of the effect of adding fly ash and water concentration of clay on red bricks’ compressive strength. Fisis characteristic and bricks’ compressive strength is according to SNI 15-2094-2000. Variation of fly ash that were used were 5%, 10%, 15%, 20%, 25%, and 30% from the weight of clay. Adding water concentration was based on three criterions of mortar clay condition, namely hard, normal, and soft. Hardmortar clayis a condition of the clay mixture which used less water than the normal mixture. Normal mixture is a condition ofthe clay mixture which usedwater based on usual concentration in brick factory. Soft mixture is a condition ofthe clay mixture that used much water than normal mixture. In this research, there are 8 sample for normal bricks and there are 144 sample for variation bricks. The optimum value of compressive strength for hard and normal mixture of variation bricks were obtained in 10% of fly ash variation which increased 33,59%, and 2,82% from normal bricks. Compressive strength for soft mixture of bricks was obtained in 5% of fly ash variation which increased 28,25% from normal bricks.

PENGARUH PENAMBAHAN FLY ASH (ABU TERBANG) DAN ABU SEKAM PADI TERHADAP KUAT TEKAN BATA MERAH PEJAL KONVENSIONAL Prakoso, Bimo; Elhusna, Elhusna; Wahyuni, Ade Sri
Inersia: Jurnal Teknik Sipil Vol. 10 No. 1 (2018)
Publisher : Universitas Bengkulu

Red brick is a building element used in the construction of buildings and made of clay plus water with or without material mixture of other materials. Fly ash and rice husk ash contain silica. Silica is a material that has the nature of pozzolan which can increase the compressive strength of the brick when mixed with the soil. This study aims to determine the effect of the addition of fly ash and rice husk ash (ASP) to the value of compressive strength of clay brick. The process of making the test specimen follows the procedure in the brick factory.Variations of specimens made were normal bricks and bricks with the addition of fly ashand rice husk ash (ASP) used were 5%, 10%, 15%, 20%, 25% and 30% to the weight of clay.The number of test specimens of each percentage of fly ash and rice husk ash (ASP) as much as 12 specimens. The method of testing of red brick strength is referred to SNI 15-20942000. The result of the research shows that the compressive strength of the clay brick has decreased from normal clay brick by 38,97 kg/cm². The biggest decrease in compressive strength value obtaines at clay brick with 30% ashes (48,04%) and the smallest decreased obtaines at clay brick compressive strength in clay brick with 5% ash (5,98%). The decrease of the compressive strength is influenced by the amount of ash addition, water quantity and moisture content.

MORTAR SEMEN ABU DAUN PINUS DAN ABU BATA MERAH Elhusna, Elhusna; Afrizal, Yuzuar; Sofia, Halimatus
Inersia: Jurnal Teknik Sipil Vol. 11 No. 1 (2019)
Publisher : Universitas Bengkulu

his article is a report research of mortar with 10% Pine leaf ash (PLA) and 5 variations of red brick ash (RBA). The mortar is a mixture of fine sand, water, and adhesive material with proportion of cement and fine sand is 1 dan 3. RBA was added up to 50% of cement with 10% addition for each variation. Both of the ashes were added base on the weight volume of cement of normal mortar. The normal mortar is the mortar without the ashes. The initial flow of themortar is 105%-115%. The 5 cm mortar cubes were made to test the compressive strength and the absorbtion. The tests were done according to SNI 03-6825-2002 and SNI 15-2049-2004 when the speciments age is 28 days. The cube speciments were taken out of the water sink a day earlier. The highest compressive strength is 22,4% higher than the normal mortar come out ofthe PLA mortar without RBA. The strength of the PLA and 10% RBA mortar is 4,4% higher than the normal one and 18% lower then the PLA mortar without the RBA. The lowest mortar absorbtion (11,68%) belongs to PLA mortar with 10% RBA. The research result shows that the absorbtion and the compressive strength of the mortar isnot always inversely propotional.

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