Investigation of the effect of silica fume and synthetic foam additive on cell structure in ultra-low density foam concrete

Şeker, Burçin Şenol; Gökçe, Murat; Toklu, Kenan

doi:10.1016/j.cscm.2022.e01062

Cited by 9 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Combined with the above analysis, the influence of various factors on the strength mainly by affecting the hardening of cementitious materials and the internal pore structure. The foam concretes with uniform distribution of pore structure, concentrated pore size distribution, and a smaller number of connected pores and large pores show better compressive properties [ 34 , 35 , 36 ]. The best level combination for the target 28-day compressive strength is selected as A2B3C3D2.…”

Section: Resultsmentioning

confidence: 99%

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Chen

et al. 2022

Materials

View full text Add to dashboard Cite

The shield tunnel is a common solution for natural gas pipelines crossing rivers. Consequently, the development of natural gas tunnel filling materials with excellent performance is crucial to the safe operation and maintenance of pipelines. The foam concrete offers a reasonable solution. Nevertheless, since its inherent compressive strength decreases almost proportionally with the decrease in density, obstacles remain concerning obtaining the high density and relatively low strength required for natural gas tunnel filling. Here, a synergistic optimization strategy was proposed involving the orthogonal test, univariate control, and comprehensive balance method. It involves modifying the type and proportion of cementitious matrix, in particular by incorporating fly ash and PVA fibers in the mix design, and synergetic determining the best mix ratio from the aspects of compressive strength, stability, and dry density. The obtained foam concrete has a compressive strength of 4.29 MPa (FC4) and a dry density of 1060.59 kg/m3 (A11), which meets the requirements of pipeline pressure and pipeline anti-floating. This study is applied to the Yangtze River shield crossing project of the Sino-Russian Eastern Gas Pipeline, and ANSYS was used to simulate the stress and deformation of the foam concrete. This work provides an efficient foam concrete optimization mix scheme, and supports the application of foam concrete in the filling of the long-distance cross-river natural gas tunnels.

show abstract

Section: Resultsmentioning

confidence: 99%

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Chen

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…Şeker ve ark (2022) çimento ve çimento + silis dumanı ile yaptıkları köpük beton çalışmasında, köpük betonun birim hacim ağılığı 200-220 kg/ m3 arasına kadar düşürmüşlerdir. Bu betonların, basınç dayanımlarında ise 28 gülüklerde en düşük 0,21, en yüksek 0,32, MPa elde edilirken ısı iletim katsayısı değerleri en düşük 0,060 iken en yüksek 0,073 W/mK olarak bulmuşlardır [20,21]. Köpük beton üzerinde yapılan bilimsel çalışmalarda karışım tasarımında, basınç dayanımı, yoğunluğu gibi özellikler temel kıstas olarak alınmaktadır [14].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Köpük Beton Üretiminde İnşaat Yıkıntı Atığı İnce Agregası Kullanımı ve Optimum Su/Çimento Oranının Belirlenmesi

ÖZÇELİK¹,

Şimşek

2024

Politeknik Dergisi

View full text Add to dashboard Cite

The supply of raw materials in the construction sector causes the rapid decrease or destruction of our natural resources. Recycling of construction demolition waste in order to reduce the reduction or destruction of natural resources will reduce the need for raw materials as well as environmental pollution. In this study, the feasibility of producing foam concrete with fine (sand) aggregate from construction debris was investigated. Foam concrete was produced with 5 different water/cement ratios by using construction debris that passed through a 4 mm sieve as aggregate in the mixtures. The properties such as unit volume weight, compressive strength, water absorption ratio, ultra sound transmission rate and thermal conductivity coefficients of the produced foam concrete samples were investigated. The most suitable of these properties gave a mixture design with a W/C ratio of 0.45.

show abstract

“…The elevated-density foam concrete can be used to mould load-bearing components like buffering pads or retaining walls, while low-density (less than 800 kg•m −3 ) foam concrete is usually employed for thermal insulation and noise absorption [4]. Compared with conventional organic thermal insulating materials, such as rigid polyurethane foam (RPUF), expanded polystyrene (EPS) concrete, and extruded polystyrene (XPS) concrete, foam concrete displays better fireproof and waterproof performance [5], and hence gains popularity in the construction industry.…”

Section: Introductionmentioning

confidence: 99%

Mix proportion optimization and early strength development in modified foam concrete: an experimental study

Shi

Yin

Wei

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

The influence of the single polycarboxylate superplasticizer (PCE) and blending it mixed hydroxypropyl methylcellulose (HPMC) on hardening moulding quality and surface pulverisation of foam concrete was investigated. An orthogonal experimental design was employed to determine the optimum combination of parameters for four property indexes (PIs) in this paper. A multi-index matrix analysis method was used to evaluate the parameter combinations and obtain the overall optimal performance for the PIs. The effect of calcium formate (CaF) on the early compressive strength of modified foam concrete with the most optimal combination in different density grades was also studied. The results indicate that the incomplete cement hydration reaction is the essential cause of pulverisation, which can be alleviated by adding a suitable PCE. Defoaming and precipitation occur when the PCE incorporated exceeds 0.1%, which can be mitigated by the addition of 0.02 to 0.06% HPMC. The orthogonal analysis indicates that the anti-cracking agent has a more substantial effect on the strength of the foam concrete than the thickening agent. The most significant factor of mechanical properties is PP fiber followed by dispersible latex powder (DLP). The optimal combination of foam concrete is 0.06% HPMC, 0.3% DLP, and 0.5% PP fiber. The early compressive strength of foam concrete can be significantly enhanced by increasing the CaF content. However, increasing the density level results in a decrease in the 28-day compressive strength of the foam concrete.

show abstract

Investigation of the effect of silica fume and synthetic foam additive on cell structure in ultra-low density foam concrete

Cited by 9 publications

References 28 publications

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Köpük Beton Üretiminde İnşaat Yıkıntı Atığı İnce Agregası Kullanımı ve Optimum Su/Çimento Oranının Belirlenmesi

Mix proportion optimization and early strength development in modified foam concrete: an experimental study

Contact Info

Product

Resources

About