An Investigation of Damage Factors in Industrial Scale of Light-Weight Bricks Production

Wulandari, Kiki Dwi; Ekaputri, Januarti Jaya

doi:10.1051/matecconf/201713801018

Cited by 3 publications

(7 citation statements)

References 14 publications

(22 reference statements)

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“…Porosity tests were set up to find the porosity as the physical properties that related to compressive strength of the concrete. X-Ray Diffractometer (XRD) tests were conducted to analyze the chemical compositions [21]. Scanning Electron Microscopy (SEM) were set up to obtain the microscopy scale of the specimens in each mixture.…”

Section: Proportions and Test Methodsmentioning

confidence: 99%

Effects of microbial agents to the properties of fly ash-based paste

Wulandari¹,

Ekaputri²,

Triwulan³

et al. 2018

MATEC Web Conf.

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Specific microbial agents such as bacteria are often used in concrete to improve its performance. Some microbes act as self-healing agents to close cracks in concrete, and to increase concrete strength. This paper presents a study to observe the effects of microbe addition to two types of concrete mixtures the fly ash-based, as geopolymer paste, and portland cement paste containing fly ash. Furthermore, the investigation was conducted to compare the properties of each paste, such as its compressive strengths, specific gravities, porosity, microstructures, and XRay diffracting properties. The results indicate that microbial activities positively affected the properties of both, portland cement paste and geopolymer paste. The result reported here strongly suggests that fly ash can be used to produce a high quality, but environmental friendly construction material when it’s mixed together with useful microbes.

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Section: Proportions and Test Methodsmentioning

confidence: 99%

Effects of microbial agents to the properties of fly ash-based paste

Wulandari¹,

Ekaputri²,

Triwulan³

et al. 2018

MATEC Web Conf.

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“…The chemical compositions of the SS oxides were obtained using X-Ray Fluorescence (XRF) analysis [2]. The amount of the oxides were listed in Table 3 below.…”

Section: Chemical Compositions Of Ssmentioning

confidence: 99%

“…Silica sand is a major compound of sand, rock, and mineral ores [1]. Sandblasting waste (silica sand) is pozzolanic with a high SiO2 content (more than 85%) making it useful for cement mixtures [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Compressive Strength Investigations Of Foamed Mortar Incorporating Sandblasting Waste As Supplementary Cementitious Materials

Wulandari,

Jannah,

Wutsqo

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Silica sand is one of the abrasive materials commonly used in the sandblasting process. The production of sandblasting waste is raising yearly, linear with the rapid development of the shipping industries. Silica sand was produced as by-product waste, approximately 400 ton per year. This research focused on compressive strength investigations of the foamed mortar incorporating silica sand as a supplementary cementitious material (SCM). Foamed mortar is a lightweight mortar made from a mixture of water, cement, sand, and foam, which can reduce the density of the mortar for construction purposes. Prior to use as SCM, the silica sand was pre-treated by using mechanical grinding to produce finer materials similar to cement. The observations were applied to pre-treated silica sand, such as chemical compositions, particle size analysis, normal consistency test, and setting time test. The specimens used in this research were mortar concrete with dimensions 5 x 5 x 5 cm and tested according to ASTM C579-01. The pre-treated silica sand varied from 10%, 20%, and 30% by weight of cement, were applied in this investigation. The compressive strength and spesific gravity were also observed. The results show that 20% cement replacement with pre-treated silica sand is the optimum composition and has 52.2 MPa in compressive strength at 28th days. These investigations conclude that pre-treated silica sand is potentially used as SCM in foamed mortars for sustainable concrete materials.

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“…The chemical composition is predominantly aluminium, at more than 99%, but it contains about 36.72% water. [12] This is a highly reactive substance that produces a huge amount of hydrogen gas.…”

Section: Aluminium Powdermentioning

confidence: 99%

The effect of additional aluminium to the strength of geopolymer paste

Rahman

Ekaputri

2018

MATEC Web Conf.

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Alternative cementitious materials have been widely used because of the environmental issue of greenhouse gasses produced by portland cement production. A possible solution is the green concrete made from fly ash based-geopolymer paste. The natural differences of Indonesian coal ash lead to various chemical contents of fly ash. The chemical composition of alkali activated paste is also varied causing differences in the strength of the paste. Silica to alumina ratio is indicated as the greatest influencing factor to geopolymer strength. The bond among silica-alumina preserves a compact microstructure resulting in the strength. This paper proposes a Si-Al ratio between 1.5 and 2.0 by adding a synthetic aluminium substance from some sources. Using a natural aluminium substance from other fly ashes which contain excessive amounts of Al2O3 was one of that efforts. The result indicated that the addition of a small amount of aluminium powder showed insignificant differences in geopolymer strength. The powder addition of up to 4% of fly ash decreased the strength by up to 60% of the original one. The methods of mixing are indicated as the trigger of lower strength because

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An Investigation of Damage Factors in Industrial Scale of Light-Weight Bricks Production

Cited by 3 publications

References 14 publications

Effects of microbial agents to the properties of fly ash-based paste

Effects of microbial agents to the properties of fly ash-based paste

Compressive Strength Investigations Of Foamed Mortar Incorporating Sandblasting Waste As Supplementary Cementitious Materials

The effect of additional aluminium to the strength of geopolymer paste

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