Methods for testing the quality of lightweight cellular concrete during pouring

Liu, Xin; Qian, Xiaolei; Pu, Shikun; Sheng, Ke; Sun, Dongning; Hong, Baoning

doi:10.1016/j.conbuildmat.2021.125755

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…In general, the structure of aerated concrete is characterized by its solid microporous matrix and macropores. The reason for the formation of macropores is an increase in volume due to the effect of aeration; micropores are located in the walls between macropores [25][26][27][28]. For example, the porosity of aerated concrete averages 70-80%, and about 45-55% of this porosity is the porosity caused by the chemical reaction of aluminum powder in an alkali solution [29,30].…”

Section: Introductionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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At present, the load-bearing enclosing structures of buildings and structures are designed and built considering the increasing requirements for energy efficiency and energy saving of such structures. This is due to the need for a thrifty attitude to the energy consumed and the need to strive for the greening of construction and increase the energy efficiency of buildings and structures. In this regard, one of the most effective and proven building materials is cellular concrete. The purpose of this study was to study the influence of some prescription factors on the structure formation and properties of non-autoclaved aerated concrete with improved characteristics. Standard test methods were used, as well as SEM analysis of the structure of aerated concrete. Non-autoclaved aerated concrete with the replacement of part of the cement with microsilica in an amount from 4% to 16% MS showed higher strength characteristics compared to aerated concrete, where part of the cement was replaced by the addition of granulated blast-furnace slag and a complex additive. The maximum value of compressive strength was recorded for aerated concrete with 16% MS addition. The largest increase in the coefficients of constructive quality was observed in compositions of aerated concrete with the addition of silica fume from 11% to 46% compared with the control composition. The addition of microsilica makes it possible to achieve an improvement in the thermal conductivity characteristics of non-autoclaved aerated concrete (up to 10%). Replacing part of the cement with slag and complex additives does not have a significant effect on thermal conductivity. The obtained dependencies were confirmed by the analysis of the structure formation of the studied aerated concrete at the micro level. An improvement in the microstructure of aerated concrete with the addition of microsilica in comparison with samples of the control composition has been proven.

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Section: Introductionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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“…In terms of cost characteristics, non-autoclaved cellular concretes significantly outperform autoclaved competitors due to the significantly reduced cost of production and manufacture of such concretes and less environmental impact. From the point of view of technological and recipe factors, there are quite a lot of studies of non-autoclaved and autoclaved aerated concrete [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. However, from the point of view of fundamental science, some gaps should be filled with additional research in the phenomenon of outgassing during the formation of the structure of non-autoclaved aerated concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Investigation of dependences and modeling parameters of the behavior of AAC products in terms of wind load [ 24 ], material moisture [ 25 , 26 ], strength obtained using non-destructive testing methods [ 26 ], replacing aluminum powder on natural zeolite [ 27 ], as well as studies on porosity parameters [ 28 , 29 , 30 ], made a significant contribution to the development of this study and helped to formulate its purpose and scientific novelty.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling and Experimental Substantiation of the Gas Release Process in the Production of Non-Autoclaved Aerated Concrete

et al. 2022

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The widespread use of aerated concrete in construction has led to the emergence of many types and compositions. However, additional research should fill theoretical gaps in the phenomenon of gas release during the formation of the structure of aerated concrete. Based on theoretical analysis and experimental studies, the article proposes a mathematical model of the swelling process based on the physicochemical laws of convection and molecular diffusion of hydrogen from a mixture and the conditions of swelling, precipitation, and stabilization of the mixture. An improved method for the manufacture of aerated concrete is proposed, which consists of introducing cement pre-hydrated for 20–30 min into the composition of the aerated concrete mixture and providing improved gas-holding capacity and increased swelling of the mixture, reducing the average density of aerated concrete up to 29% and improving heat-shielding properties up to 31%. At the same time, the small dynamics of a decrease in the strength properties of aerated concrete were observed, which is confirmed by an increased structural quality factor (CSQ) of up to 13%. As a result, aerated concrete has been obtained that meets the requirements of environmental friendliness and has improved mechanical and physical characteristics. Economic efficiency is to reduce the cost of production of aerated concrete and construction in general by about 15%.

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“…Pemal nfal al t bal tal ringal n dal lal m kontruksi al dal lal h memiliki sisi yal ng lebih presisi dal n tingkal t keral tal al n permukal al n yal ng lebih hal lus.Tentu hal l ini menjal di kelebihal n dibal ndingkal n bentuk bal tal tral disional l. Hal l ini bisal mempercepal t proses pengerjal al n kontruksi dal ri sebual h bal ngunal n. Terdal pal t dual jenis bal tal ringal n yal ng umum dipal kal i sebal gal i bal hal n bal ku pembual tal n dinding bal ngunal n, yal itu Al utoclal ved Al eral ted Concrete (Al Al C) dal n Cellulal r Lightweight Concrete (CLC) [1,7,8,9,10]. Kedual bal tal ringal n ini dibual t dal ri cal mpural n mal terial l yal ng salmal, nal mun komposisi tial p-tial p mal terial lnyal berbedal .…”

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Pengaruh Salinitas Pasir Terhadap Kuat Tekan Bata

Mascik,

S Suzen,

Ary W

2023

JITT

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The development of technology, especially in the construction field, in manufacturing bricks is increasingly rapid and varied, one of which is lightweight brick. The light brick is a composite building material made of sand, cement, limestone, gypsum, water, and aluminum powder. In general, lightweight bricks have two types, Autoclaved Aerated Concrete (AAC) and Cellular Lightweight Concrete (CLC). Light bricks were created to lighten the structural load of a construction building, speed up construction, and minimize material waste during the wall installation process. Sand is a staple in the construction process. In addition, sand material cannot be separated from its use in the industrial world. The Taguchi method is a methodology in engineering that aims to improve the quality of products and processes and can reduce costs and resources to a minimum. The compressive strength of the concrete load is the magnitude of the load per unit area, which causes the concrete specimen to collapse when loaded with a specific compressive force, which is generated by the press machine; the compressive strength of the concrete will increase with increasing age of the concrete, where the compressive strength of the concrete will increase rapidly (linearly). Salinity is the salt content dissolved in water which is one of the physical parameters that can affect the quality of water, soil and sand.

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Methods for testing the quality of lightweight cellular concrete during pouring

Cited by 9 publications

References 24 publications

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Mathematical Modeling and Experimental Substantiation of the Gas Release Process in the Production of Non-Autoclaved Aerated Concrete

Pengaruh Salinitas Pasir Terhadap Kuat Tekan Bata

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