Pozzolanic hardened three-phase-foams

Krämer, Christina; Kowald, Torsten; Trettin, R.

doi:10.1016/j.cemconcomp.2015.06.002

Cited by 26 publications

(15 citation statements)

References 20 publications

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“…When w/c > 0.8, the pores were round and expansive, accompanied with a widened pore diameter distribution range. Krämer et al [16,17] explored the formation of pore shells in foam concrete and the pore shell enhancement mechanism of volcanic ash. She found that adding volcanic ash when preparing foam concrete can enhance foam concrete strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water-Cement Ratio on Pore Structure and Strength of Foam Concrete

Liu

Zhao

et al. 2016

Advances in Materials Science and Engineering

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Foam concrete with different dry densities (400, 500, 600, 700, and 800 kg/m3) was prepared from ordinary Portland cement (P.O.42.5R) and vegetable protein foaming agent by adjusting the water-cement ratio through the physical foaming method. The performance of the cement paste adopted, as well as the structure and distribution of air pores, was characterized by a rheometer, scanning electron microscope, vacuum water saturation instrument, and image analysis software. Effects of the water-cement ratio on the relative viscosity of the cement paste, as well as pore structure and strength of the hardened foam concrete, were discussed. Results showed that water-cement ratio can influence the size, distribution, and connectivity of pores in foam concrete. The compressive strength of the foam concrete showed an inverted V-shaped variation law with the increase in water-cement ratio.

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Section: Introductionmentioning

confidence: 99%

Effect of Water-Cement Ratio on Pore Structure and Strength of Foam Concrete

Liu

Zhao

et al. 2016

Advances in Materials Science and Engineering

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“…In the SLS, the SS is produced from NDS, and the SLCM is made from DS using the solidification method by pozzolanic reaction [18]. Table 6 shows the amount and composition of the solidifying agents used for SS and SLCM.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Energy Recovery from Waste on Landfill Gas: A Case Study from Korea

Kim¹,

Pak²,

Chun³

2018

Pol. J. Environ. Stud.

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The volume and composition of landfill gas (LFG) [1] as a product of biochemical degradation in the landfill during landfill disposal [2] has a great impact on the operation of a landfill [3]. Therefore, in order to operate landfill sites economically and in an environmentally friendly manner, the characteristics of landfill wastes should be identified prior to demolition planning and operation of the landfill sites. The amount and nature of LFG vary greatly depending on the energy recovery and recycling projects for landfill waste. In other words, if waste energy recovery is carried out before waste landfill, then the inorganic waste after waste pretreatment and residue from the thermochemical energy recovery are left as landfill waste. Therefore, the volume of LFG generated differs in direct landfills where energy recovery is not carried out. In addition, whether or not landfilling solidified sludge [4][5], mixed landfilling of the total wastes, and the separate landfilling of specific wastes are carried out also affect LFG output.The influence of the traditional method of direct landfilling of total wastes on the characteristics of the landfill such as LFG production due to energy recovery and separate reclamation of the waste materials can be estimated, making it possible to better plan the energy recovery system and energy recycling projects [6].Pol. J. Environ. Stud. Vol. 27, No. 6 (2018), 2613-2622 Original Research AbstractIn order to conceive of an efficient way to manage a landfill, we conducted an exemplary study of the Sudokwon Landfill Site in South Korea, with particular regard to the influence of energy recovery from waste. As a result of the BMP test, biogas production of demolition waste was much lower than household waste even in the same waste type. Gas production from the residual substance of energy recovery from waste (ash), waste soil, and the sludge landfill cover material was almost zero, but the solidified sludge showed 4.1 times greater than digested sludge due to the fewer pozzolanic reactions. Lysimeter test results show that the total amount of landfill gas was reduced to about 1/27 when combustible waste is buried after the recovery of energy, but, in order to be able to completely eliminate the landfill gas collecting system in a newly managed landfill, solidified sludge should not be disposed of in the landfill site. In addition, the maximum concentration of hydrogen sulfide was 60.9×10 3 ppm, when total waste was mixed and landfilled. However, the concentration of hydrogen sulfide decreased to about 1/6 and the total load largely decreased to about 0.9% when applied to landfill waste after energy recovery.

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“…At the same time, a three-dimensional network structure will be formed between the foam surface and the continuous phase, which is advantageous to prolong the drainage time of the liquid membrane [177]. A schematic representation of threephase-foams after foaming reported by Krämer et al [178] is shown in Figure 3.…”

Section: Influence Of Additivementioning

confidence: 97%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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Foam concrete (FC) has the potential of being an alternative to ordinary concrete, as it reduces dead loads on the structure and foundation, contributes to energy conservation, and lowers the cost of production and labor cost during the construction and transportation. The paper reports a state-of-the-art review of foam concrete in terms of its components, manufacturing and material properties like drying shrinkage, compressive strength, stability and pore structure, etc. In view of the significance of the FC in engineering construction, it also includes a state-of-the-practice review of foam concrete in tunnel and underground engineering. Some shortcomings and technical limitations as well as emerging direction for performance enhancement of FC are also discussed. Current review concludes that the long-term performance and enhancement-associated properties need to be deeply investigated. This study can help alleviate consumer concerns and further encourage the wider application of FC in civil engineering.

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Pozzolanic hardened three-phase-foams

Cited by 26 publications

References 20 publications

Effect of Water-Cement Ratio on Pore Structure and Strength of Foam Concrete

Effect of Water-Cement Ratio on Pore Structure and Strength of Foam Concrete

The Influence of Energy Recovery from Waste on Landfill Gas: A Case Study from Korea

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

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