Phase change materials in concrete: An overview of properties

Adesina, Adeyemi; Awoyera, Paul O.; Sivakrishna, A.; Kumar, K. Rajesh; Gobinath, R.

doi:10.1016/j.matpr.2019.11.228

Cited by 36 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Concrete is the most widely used construction building material in the world [ 1 ]. It is expected that the annual consumption of concrete lies around 23 trillion kilograms [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Depth of Wear of Eco-Friendly Concrete Using Machine Learning Based Computational Approaches

et al. 2021

View full text Add to dashboard Cite

To avoid time-consuming, costly, and laborious experimental tests that require skilled personnel, an effort has been made to formulate the depth of wear of fly-ash concrete using a comparative study of machine learning techniques, namely random forest regression (RFR) and gene expression programming (GEP). A widespread database comprising 216 experimental records was constructed from available research. The database includes depth of wear as a response parameter and nine different explanatory variables, i.e., cement content, fly ash, water content, fine and coarse aggregate, plasticizer, air-entraining agent, age of concrete, and time of testing. The performance of the models was judged via statistical metrics. The GEP model gives better performance with R2 and ρ equals 0.9667 and 0.0501 respectively and meet with the external validation criterion suggested in the previous literature. The k-fold cross-validation also verifies the accurateness of the model by evaluating R2, RSE, MAE, and RMSE. The sensitivity analysis of GEP equation indicated that the time of testing is the influential parameter. The results of this research can help the designers, practitioners, and researchers to quickly estimate the depth of wear of fly-ash concrete thus shortening its ecological susceptibilities that push to sustainable and faster construction from the viewpoint of environmentally friendly waste management.

show abstract

“…Concrete is the most widely used construction building material in the world [ 1 ]. It is expected that the annual consumption of concrete lies around 23 trillion kilograms [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Depth of Wear of Eco-Friendly Concrete Using Machine Learning Based Computational Approaches

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Similarly, Ma and Bai, Ling et al, Cui et al and Norvell et al stated that when 30% PCM by volume is added to concrete, it results in a reduction in compressive strength of about 30% (Cui et al 2015;Ling and Poon 2013;Ma and Bai 2018;Norvell, Sailor, and Dusicka 2013). However, it has been noted that the presence of coarse aggregate in concrete compared to the fine aggregate mortar mix supports the resulting compressive strength (Adesina et al 2020).…”

Section: The Effect Of Pcm On Compressive Strengthmentioning

confidence: 98%

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

Çelik

Kayabaşi

ŞENER

2022

Mühendislik Bilimleri Ve Tasarım Dergisi

View full text Add to dashboard Cite

One of the important areas of Phase Changing Materials (PCM) is to increase the heat retention capacity of building components. Researches are carried out on the heat retention capacities of PCMs to store energy in building components and to ensure building temperature control. The use of PCM in building components has become an important tool for energy saving, since ensuring building temperature control in summer and winter conditions is a situation that requires continuity. This feature provided to the building component provides an improvement in the energy identity of the building. In general researches, the use of macro, micro encapsulated PCM decreases the heat conduction coefficient as it increases the heat retention capacity of the building components, but effects compressive strength positive or negative. However, when the capsule size used in micro capsule applications is reduced to 7 microns and below, it is seen that the strength increases, while the thermal conductivity coefficient continues to decrease. When the PCM capsule particle sizes used in the building components are reduced, it provides an improvement in the granulometry of the component, so a positive effect on strength is seen in the building components. As a result of this research, differences in compressive strength were observed depending on the macro, micro and nano dimensions and mixing ratios of the pcm addition. However, due to the continuous increase in the PCM ratio of the building component, the heat holding capacity of the building component increases and its thermal conductivity decreases.

show abstract

“…without moving and progressively increased until the sample breaks and the crack load is recorded. A Tektronix AFG3022B arbitrary waveform generator and a Tektronix TDS1002B-SC were the source and receiver of the digital oscilloscope signal used in this experiment [19,20], respectively. The ultrasonic wave's frequency was 50 KHz and the input voltage was 10 V. The transmitting amplitude values, times, and waveform of the ultrasound were recorded.…”

Section: Experimental Set-up and Test Programmementioning

confidence: 99%

Strengths of Sulfoaluminate Cement Concrete and Ordinary Portland Cement Concrete After Exposure to High Temperatures

Tchekwagep¹

2020

Ceramics - Silikaty

View full text Add to dashboard Cite

The use of SAC (sulfoaluminate cement) has been increasing in the constructions of diverse buildings with some close to reactors, which are often exposed to high temperatures in China. This study compares the flexural strength, compressive strength, crack load, mass weight loss, porosity, and flexural stress--strain of the sulfoaluminate cement concrete (SACC) to that of ordinary Portland cement concrete (OPCC) after both are exposed to high temperatures. The results show that the samples of SACC show a rapid decrease in the flexural strength, crack load, and compressive strength after heating, and, thus, cannot be repaired, but should be demolished. Samples made with OPCC can be repaired because the structural integrity remains acceptable after heating. 56 % SACC is < half of its initial strength after heating to 200 °C while OPCC remains at > 90 % of its compressive strength after heating at 200 °C, and retains 80 % of its compressive strength when heated to 300 °C. SACC initially had a higher flexural strength and consequently a higher crack load; therefore, it performed better than the OPCC in terms of the load carrying capacity of the structure. Also, the OPCC had a constant decrease in the strength, compared to the SACC which did not. However, the OPCC has a better resilience strength rating as the temperatures increase than the SACC one because testing revealed a very rapid decrease in the strength after exposure to 100 °C, 200 °C, and 300 °C. The results agree on the better firm structure uniformity and density of the SACC at an ambient temperature (20 °C) compared to the OPCC. The severe deterioration (micro-crack) inside both concretes, revealed by the longer transmitting time and the small amplitude values of the waves, indicated the effective negative impact which is no longer demonstrated when the extreme temperature has a larger effect on the concrete made with SAC, therefore, the other results highlighted the rapid decrease in the strength of the SACC compared to that of the OPCC.

show abstract

Phase change materials in concrete: An overview of properties

Cited by 36 publications

References 16 publications

Simulation of Depth of Wear of Eco-Friendly Concrete Using Machine Learning Based Computational Approaches

Simulation of Depth of Wear of Eco-Friendly Concrete Using Machine Learning Based Computational Approaches

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

Strengths of Sulfoaluminate Cement Concrete and Ordinary Portland Cement Concrete After Exposure to High Temperatures

Contact Info

Product

Resources

About