Mechanical properties of lightweight aerated concrete with different aluminium powder content

Shabbar, Rana; Nedwell, Paul; Wu, Jack

doi:10.1051/matecconf/201712002010

Cited by 23 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is the time required to inject the slurry during cementing. The test was carried out in dynamic conditions and the slurry was in constant motion, which corresponds to its being injected into the well [14,16]. According to the data in Table 2, the base slurry begins to thicken (30 Bc) after 5:55 h and the thickening ends at (100 Bc) 7:10 h. As can be seen in Table 2, the second slurry takes longer to thicken than the base slurry, despite having a 15% microcement content in its composition.…”

Section: Thickening Timementioning

confidence: 99%

“…The occurrence of low reservoir pressure is manifested by the disappearance of mud while drilling or the infiltration of cement slurry into the absorbent geological structure. This leads to a decrease in the hydrostatic pressure of the drilling mud in the well and a violation of the pressure balance condition [11][12][13][14][15][16][17][18]. A reduction or complete drop of the hydrostatic pressure of the drilling mud results in a collapse of a well wall and in further complications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recipe of Lightweight Slurry with High Early Strength of the Resultant Cement Sheath

Kremieniewski

2020

Energies

View full text Add to dashboard Cite

Admixtures of mineral or waste filling materials are used to reduce slurry density. However, the sheath made of lightweight cement slurry has low mechanical performance at the initial bonding time. The required strength is achieved later. This is the main problem when evaluating the cement bond logging. The waiting time for geophysical measurements after injecting and bonding of cement is nowadays increasingly shortened. This is forced by economic factors. Too early geophysical measurements may result in obtaining a false indication of the cement bond logging. The lack of cement or partial bonding, despite the presence of slurry in the annular space is then found. The slurry developed by the author achieves high compressive strength after a short bonding time. Reducing the amount of water in the slurry resulted in a lowered filtration value. This is important in preventing gas migration after the cementing. The designed slurry also reaches the value of 3.5 MPa in a short time. This allows for an earlier commencement of a well drilling. The use of said slurry improves the effectiveness of the well sealing and makes it possible to obtain a reliable knowledge of the bond logging.

show abstract

Section: Thickening Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recipe of Lightweight Slurry with High Early Strength of the Resultant Cement Sheath

Kremieniewski

2020

Energies

View full text Add to dashboard Cite

show abstract

“…Based on the results of researches [18,23] and in the case of this study, the initial ratios of used materials by mass of PC in the mixes for the AC-samples are presented in Table 6. According to data from Table 6, a total number of five AC mixtures with varying contents of aluminium powder were prepared for current research.…”

Section: Mixture Proportions and Samples Preparationmentioning

confidence: 99%

Effect of Aluminium Powder on Light-weight Aerated Concrete Properties

et al. 2019

View full text Add to dashboard Cite

Light-weight aerated concrete (LAC) is produced by making LAC involves the addition of a gas-forming admixture like aluminium powder (AP) to a wet mortar mixture. In concrete during curing, AP will react with the calcium hydroxide in the mixture to form hydrogen. The amount of gas-forming is dependent on the mechanical properties requirements. The aim of the current work was to investigate the properties of aerated concrete (AC) containing 30% fly ash and various AP content, including dry density, porosity and modulus of elasticity, as well as strengths of test specimens. The results of this study showed that when AP content increased, the density of AC decreased, but its porosity increased. Whereas an increase in the amount of AP caused a decrease in both the compressive strength, tensile strength and the modulus of elasticity of ACspecimens. The investigation of newly modified AC through combination of local by-product in Vietnam would decrease the content of Portland cement was used and as well as reduce the amounts of ash and slag TPP as well as industrial waste thrown at a landfill. Therefore, assisting the thermoelectric power plants to be more environmentally friendly in the future.

show abstract

“…Fibers enhance and modify the tensile strength, flexural toughness, impact resistance, fracture energy, arrest cracks formation and propagation, and improve the strength and ductility . Aerated concrete (AC) is one of the LWC types formed by creating gas bubbles within a conventional concrete that aluminum powder reacts with the calcium hydroxide created by cement hydration to generate hydrogen gas bubbles . Supplementary cementitious materials (SCM) used as a replacement by weight of cement or fine aggregate to obtain sustainable concrete by reducing the cement consuming.…”

Section: Introductionmentioning

confidence: 99%

“…2,4 Aerated concrete (AC) is one of the LWC types formed by creating gas bubbles within a conventional concrete that aluminum powder reacts with the calcium hydroxide created by cement hydration to generate hydrogen gas bubbles. 5 Supplementary cementitious materials (SCM) used as a replacement by weight of cement or fine aggregate to obtain sustainable concrete by reducing the cement consuming. Generally, for each ton of cement produced, release more than half of all CO 2 into the air subsequently using SCM decrease the CO 2 emission that will activist effect on the environment.…”

mentioning

confidence: 99%

Effect of ceramic waste powder as partial fine aggregate replacement on properties of fiber‐reinforced aerated concrete

Hamad

Sldozian

Mikhaleva

2020

Engineering Reports

View full text Add to dashboard Cite

Researchers have continuously attempted to reduce and recycle construction waste. Ceramic waste is mainly a byproduct of the manufacturing process. About 25% of the waste is produced because of dimension defects or incurring problems throughout the industrial process. This article aims to highlight the alternative uses of ceramic waste. In this research, ceramic waste at a powder status is reduced to fine aggregates. Here, ceramic waste powder (CWP) is used in different ratios of 25%, 50%, 75%, and 100% replacing the fine aggregate weight. Aluminum powder is used to obtain aerated concrete (AC). Glass fibers are added in ratios of 1%, 1.5%, and 2% of cement weight to obtain a fiber‐reinforced AC. The unit weight, compressive strength, splitting tensile strength, and thermal conductivity are estimated. Furthermore, scanning electron microscopy is performed to investigate the microstructure features of the composite. The results exhibit better performance in compressive and splitting tensile strength when fine aggregates were replaced by 25% and 50% of CWP. In addition, 1.5% of GFs enhance the compressive and splitting tensile strength. In addition, increasing the CWP decreases the unit weight of fiber‐reinforced AC. It is shown that CWP strongly influences the thermal conductivity of the fiber‐reinforced AC, resulting in a high composite resistant to heat transmission. The technique for order preference by similarity to an ideal solution method is used to obtain the optimal mix.

show abstract

Mechanical properties of lightweight aerated concrete with different aluminium powder content

Cited by 23 publications

References 16 publications

Recipe of Lightweight Slurry with High Early Strength of the Resultant Cement Sheath

Recipe of Lightweight Slurry with High Early Strength of the Resultant Cement Sheath

Effect of Aluminium Powder on Light-weight Aerated Concrete Properties

Effect of ceramic waste powder as partial fine aggregate replacement on properties of fiber‐reinforced aerated concrete

Contact Info

Product

Resources

About