Properties of Foamed Concrete According to Types and Concentrations of Foam Agent

김진만,; 정지용,; 황의환,; 신상철,

doi:10.4334/jkci.2012.24.1.061

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Meanwhile, Kim J.M. et al [16] concluded that the compressive strength and thermal conductivity of lowdensity FMLS using different foaming agent types were similar, while differences existed for high-density FMLS. Sun et al [17] and Panesar D.K.…”

Section: Introductionmentioning

confidence: 99%

Animal-Protein-Based and Synthetic-Based Foamed Mixture Lightweight Soil Doped with Bauxite Tailings: Macro and Microscopic Properties

Peng

Lyu³

et al. 2022

Materials

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In order to explore the effect of the foaming agent type on the properties of foamed mixture lightweight soil mixed with bauxite tailings (FMLSB), low-density (437.5 kg/m3 and 670 kg/m3) and high-density (902.5 kg/m3 and 1170 kg/m3) FMLSB were prepared using protein-based and synthetic-based foaming agents (AF and SF, respectively). The foam stability, micro characteristics, compressive strength, fluidity, and volume of water absorption of the FMLSB were investigated. The results showed that the foam made from AF had better strength and stability compared to SF. The internal pore sizes of both AF- and SF-FMLSB at low density were large, but at high density the internal pore sizes and area porosity of AF-FMLSB were smaller than those of SF-FMLSB. In terms of compressive strength, the compressive strength of AF-FMLSB was improved by 17.5% to 43.2% compared to SF-FMLSB. At low density, the fluidity of AF- and SF-FMLSB is similar, while at high density the fluidity of AF-FMLSB is much higher than that of SF-FMLSB. In addition, the stable volume of water absorption of SF-FMLSB is smaller than that of AF-FMLSB at low density, and the corresponding water resistance is better, but the situation is reversed at high density.

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Section: Introductionmentioning

confidence: 99%

Animal-Protein-Based and Synthetic-Based Foamed Mixture Lightweight Soil Doped with Bauxite Tailings: Macro and Microscopic Properties

Peng

Lyu³

et al. 2022

Materials

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“…In addition, hot water, which is supplied by individual boilers or from the Korea District Heating Corporation (KDHC), is used as the heat energy source [11]. Among these materials, ALC and finishing mortar are essential in determining heating energy consumption because they store or discharge the heat energy supplied by the hot water [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Proposal of a PCM Underfloor Heating System Using a Web Construction Method

Baek

Park

2017

International Journal of Polymer Science

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Apartment buildings in Korea have adopted underfloor heating systems using web construction methods based on concrete and hot water systems. However, since such systems consume significant amounts of energy for heating owing to their low thermal storage performance, it is necessary to develop a new system that can minimize energy consumption by improving concrete thermal storage performance. This study proposes a phase-change material (PCM) underfloor heating system to reduce energy consumption in apartment buildings. An optimal design for a PCM underfloor heating system is proposed, and thermal storage performance of the proposed system is evaluated experimentally. The temperature range of the PCM for underfloor heating is also calculated considering the proposed design and comfortable heating conditions for domestic apartment buildings. Results indicate that a PCM underfloor heating system can be constructed in the following order: (1) a 210 mm concrete slab, (2) a 20 mm cushioning material, (3) 40 mm of mortar including a 10 mm PCM thermal storage container, and (4) 40 mm of finishing mortar including wire mesh and hot water pipes. The temperature range of the PCM used for underfloor heating in domestic apartment buildings is 32–45°C. Experimental tests reveal that thermal storage performance of underfloor heating systems that apply 35, 37, 41, and 44°C as representative PCM temperatures is superior to existing systems.

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The particular foamed cement formulation by acid for oil/gas wells cementing jobs: an experimental approach

Ameri

Shadizadeh

Moghadasi

2023

Advances in Cement Research

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In this paper, new foamed cement has been formulated and designed for oil-gas wells liner and casing cementing jobs. Ultra-lightweight cements such as foamed cements are appropriate for formation damage prevention in fractured and depleted reservoirs. Current foamed cements have been prepared at high shear rates by boric acid and HA-(SLES) as a foaming agent. Different tests such as density, rheology, free water, settling, thickening time, compressive strength, fluid loss, porosity, permeability, microscopic photography and CT scanning are conducted for each sample. The results illustrate that the designed foamed cement (FBJ) has one of the lowest densities (1200 kg/m3) between drilling-cements, the compressive strength of 8963 kPa, thickening time near 3 hours. Also, its rheology becomes better in HPHT conditions. The porous media of FBJ's set-cement is not interconnected and this has been proved by porosity, permeability, microscopic photography and CT scan tests. Helium porosimeter demonstrated that FBJ's porosity is more than 73% and CT scan image processing proved that 28% of FBJ is the matrix. Moreover, the cement permeameter indicated that the permeability of FBJ's porous media is just 0.0109 mD. All of these experimental analyses show that FBJ has acceptable properties for oil-gas wells cementing jobs.

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Properties of Foamed Concrete According to Types and Concentrations of Foam Agent

Cited by 5 publications

References 2 publications

Animal-Protein-Based and Synthetic-Based Foamed Mixture Lightweight Soil Doped with Bauxite Tailings: Macro and Microscopic Properties

Animal-Protein-Based and Synthetic-Based Foamed Mixture Lightweight Soil Doped with Bauxite Tailings: Macro and Microscopic Properties

Proposal of a PCM Underfloor Heating System Using a Web Construction Method

The particular foamed cement formulation by acid for oil/gas wells cementing jobs: an experimental approach

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