scholarly journals REGULATION OF PROCESS AND RECIPE PARAMETERS ON THE BASIS OF MODELING PHYSICAL AND MECHANICAL PROPERTIES OF AUTOCLAVED AERATED CONCRETE

2019 ◽  
Vol 4 (5) ◽  
pp. 36-41
Author(s):  
Роман Шорстов ◽  
Roman Shorstov
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Maximum Temperature ◽  
Molding Sand ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
Set Up ◽  
Favorable Conditions ◽  
Mixing Water

The article discusses the possibility of regulation by changing the amount of aluminum paste, the temperature of the mixing water and the sides of mold for the expansion of molding sand of autoclaved aerated concrete. Also, the achievement of a given maximum temperature of the array, which determines the nature of the pore structure and physico-mechanical properties of products. Mathematical models for optimizing the physicomechanical properties of autoclaved aerated concrete by regulating technological and prescription parameters are obtained using the method of mathematical planning of an experiment. It is established, optimal parameters are the mixing water temperature of 40 ... 45 ° C, the amount of aluminum paste - 0.6% of the binder mass, the temperature of the sides of the form 85 ... 90 ° C, which creates favorable conditions for the expansion of the gas-concrete mixture and the combination of pore formation and set-up structural strength of the array, allowing to obtain an optimal porous structure with smaller and uniform porosity with a sufficiently low density and high strength

scholarly journals The Physical and Mechanical Properties of Autoclaved Aerated Concrete (AAC) with Recycled AAC as a Partial Replacement for Sand

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 60
Author(s):  
Abdul Rahman Rafiza ◽  
Ahmad Fazlizan ◽  
Atthakorn Thongtha ◽  
Nilofar Asim ◽  
Md Saleh Noorashikin
Keyword(s):  
Mechanical Properties ◽  
Waste Product ◽  
Physical And Mechanical Properties ◽  
Production Costs ◽  
Partial Replacement ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
New Form ◽  
Powder Content ◽  
Lower Production

The application of AAC has increased considerably in Malaysia since the 1990s. The usage of AAC has some advantages, but it also has negative environmental impacts since rejected concrete will become landfill. This study aimed to use AAC waste powder as a material that would partially replace the sand content to produce a new form of Autoclaved Aerated Concrete (AAC). The physical and mechanical properties of the newly developed AAC were investigated. This paper presents improved mechanical and physical properties of the new form of recycled AAC concrete. Besides these improvements, using recycled AAC could lower production costs. Furthermore, the usage of this recycled waste powder is both economically and environmentally advantageous. This study found that when recycled AAC was substituted for sand, AAC with a fine recycled powder content of 30% had a compressive strength that was around 16% higher than conventional AAC and between 29% and 156% higher than any value attained utilizing an industrial waste product. This study also confirmed that the greater strength could be identical to a higher tobermorite phase and that the recycled AAC surface showed a finer crystalline morphology.

Effects of Waste Soda-Lime Glass Sand and Glass Fiber on Physical and Mechanical Properties of None-Autoclaved Aerated Concrete

2021 ◽  
Vol 1023 ◽  
pp. 141-146
Author(s):  
Inzhu Mukangali ◽  
Chang Seon Shon ◽  
Kirill Kryzhanovskiy ◽  
Di Chuan Zhang ◽  
Jong Ryeol Kim
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Physical And Mechanical Properties ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Test Results ◽  
Autoclaved Aerated Concrete ◽  
Glass Sand ◽  
Aerated Concrete ◽  
Compressive And Flexural Strengths

This paper investigates the combined effect of waste soda-lime glass sand and glass fiber on the physical and mechanical properties of none-autoclaved aerated concrete (NAAC). The use of both soda-lime glass sand and glass fiber can provide silica-rich materials in the aerated concrete and can enable the elimination of an autoclaved curing by enhancing the physical and mechanical properties in aerated concrete. In this study, a total of six mixture proportions were designed to evaluate these properties in NAAC. The mixture parameters included the partial substitutions of normal sand with soda-lime glass sand (0%, 15%, and 30%) and glass fiber (1%, 2%, and 3%). A series of tests were conducted to determine density, absorption, porosity, and both compressive and flexural strengths of the NAAC. Test results present that the increase of glass sand content leads to the increasing of both compressive and flexural strengths. Moreover, the combination of the use of glass sand with glass fiber also increases the strength up to 2 times (the mixture of 30% glass sand and 3% glass fiber). Furthermore, test results indicate the relatively good relationship between the density, porosity, and of NAAC with good accuracy.

Foamer Influence on the Foam Concrete Properties Obtained in the High-Speed Foam Generator

2016 ◽  
Vol 870 ◽  
pp. 163-168 ◽  
Author(s):  
N.A. Mashkin ◽  
E.A. Bartenjeva
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Foam Stability ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Environmental Safety ◽  
Foam Concrete ◽  
Foaming Agents ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete

Recently, there has been an increasing interest to the production of the non-autoclaved aerated concrete. It has a number of advantages in comparison with other materials: low power consumption of manufacturing, high fire resistance, environmental safety, bio persistence, as well as excellent insulation properties. However, its production involves a number of problems: insufficient ultimate strength, high shrinkage, high susceptibility to the parameters of technology, and the quality of raw materials. It is a well known fact that the formation of the foam concrete structure and its main running abilities are affected not only by the mortar part, but also by the chemical nature of the foaming additive, its basic physical and chemical characteristics, as well as by the parameters of foam, produced on its basis.The paper contains an assessment of availability of the technical foam production for manufacturing of the heat-insulated constructional foam at a high-speed cavitation plant involving use of fly ash from the Central heating and power plant. We used the protein and synthetic foaming agents for the work. The authors investigated the influence of process-dependent parameters of a laboratory plant on the technical foam density and foam stability coefficient in the cement paste. The physical and mechanical properties of the non-autoclaved aerated concrete produced with investigated foams are defined. The non-autoclaved aerated concrete samples with physical and mechanical properties allowing its use in production are produced.

scholarly journals Properties of High-Strength Flowable Mortar Reinforced with Palm Fibers

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Eethar Thanon Dawood ◽  
Mahyuddin Ramli
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Test Results ◽  
Palm Fiber ◽  
Toughness Index ◽  
Strength And Toughness

This study was conducted to determine some physical and mechanical properties of high-strength flowable mortar reinforced with different percentages of palm fiber (0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6% as volumetric fractions). The density, compressive strength, flexural strength, and toughness index were tested to determine the mechanical properties of this mortar. Test results illustrate that the inclusion of this fiber reduces the density of mortar. The use of 0.6% of palm fiber increases the compressive strength and flexural strength by about 15.1%, and 16%, respectively; besides, the toughness index (I5) of the high-strength flowable mortar has been significantly enhanced by the use of 1% and more of palm fiber.

scholarly journals Strength Characteristics of High Strength Concrete (HSC) with and without Coarse Aggregate

2019 ◽  
Vol 9 (2) ◽  
pp. 4701-4704
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Flexural Strength ◽  
Silica Fume ◽  
High Strength Concrete ◽  
Mechanical Characteristics ◽  
Coarse Aggregate ◽  
High Strength ◽  
Set Up

This paper aimed to investigate the mechanical characteristics of HSC of M60 concrete adding 25% of fly ash to cement and sand and percentage variations of silica fumes 0%,5% and 10% to cement with varying sizes of 10mm,6mm,2mm and powder of granite aggregate with w/c of 0.32. Specimens are tested for compressive strength using 10cm X 10cmX10cm cubes for 7,14,28 days flexural strength was determined by using 10cmX10cmX50cm beam specimens at 28 days and 15cm diameter and 30cm height cylinder specimens at 28 days using super plasticizers of conplast 430 as a water reducing agent. In this paper the experimental set up is made to study the mechanical properties of HSC with and without coarse aggregate with varying sizes as 10mm, 6mm, 2mm and powder. Similarly, the effect of silica fume on HSC by varying its percentages as 0%, 5% and 10% in the mix studied. For all mixes 25% extra fly ash has been added for cement and sand.

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