OPTIMAL PERFORMANCE CHARACTERISTICS OF MORTAR INCORPORATING PHASE CHANGE MATERIALS AND SILICA FUME

This paper examines the thermal performance of 20 different mortar mixes, which were prepared in order to study the behaviour of mortar incorporating Phase Change Materials (PCM). The PCM was used at a rate of 10, 20 and 30% by weight of total solid materials. Silica fume was added to the mixes by 10, 20, 30 and 50% by weight of cement to enhance the mortar properties. Mortars which incorporate phase-change materials (PCM) have the capability to help regulate the temperature inside buildings, contributing to the thermal comfort while decreasing the amount of mechanical heating and cooling energy required, therefore they have the potential to reduce building carbon emissions. The mechanical characteristics and physical properties of the mortar with PCM were studied. The results show that mortar with Phase Change Materials up to PCM20% can be used with an optimal compressive strength. Silica fume (SF), up to a 20% SF addition, enhanced the mechanical properties of the mortar.

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Thermal and mechanical properties of PCM-incorporated normal and lightweight concretes containing silica fume

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2018-0334 ◽

2019 ◽

Vol 46 (7) ◽

pp. 643-656 ◽

Cited By ~ 2

Author(s):

Amin Moshtaghi Jafarabad ◽

Morteza Madhkhan ◽

Naser P. Sharifi

Keyword(s):

Compressive Strength ◽

Silica Fume ◽

Thermal Performance ◽

Phase Change Materials ◽

Mechanical Characteristics ◽

Lightweight Aggregate ◽

Salt Hydrate ◽

Promising Strategy ◽

Compressive Strength Of Concrete ◽

Physical And Mechanical Characteristics

Improving the thermal performance of concrete, as an important construction and pavement material, by incorporating phase change materials (PCMs) has been the topic of much research. Also, various carrier agents such as lightweight aggregate (LWA) have been introduced to incorporate PCMs into concrete. However, incorporation of PCM-impregnated LWA reduces the compressive strength of concrete. In this study, the application of silica fume to improve the compressive strength of PCM-incorporated concrete is investigated. Two types of PCMs, salt hydrate PCM and polyethylene glycol PCM, were incorporated into concrete via scoria LWA, and different physical and mechanical characteristics of the concrete were studied when silica fume was incorporated into the mix. The results show that incorporation of silica fume increases the compressive strength of PCM-incorporated concrete, and at the same time does not diminish the thermal performance of the incorporated PCM. Therefore, incorporation of silica fume was found to be a promising strategy to improve the compressive strength of PCM-incorporated concrete.

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

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.b5131.129219 ◽

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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Thermal performance analysis of phase change materials composed of double layers considering heating and cooling period

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2018.12.026 ◽

2019 ◽

Vol 72 ◽

pp. 255-264 ◽

Cited By ~ 3

Author(s):

Seong Jin Chang ◽

Seunghwan Wi ◽

Jongki Lee ◽

Sumin Kim

Keyword(s):

Performance Analysis ◽

Phase Change ◽

Thermal Performance ◽

Phase Change Materials ◽

Double Layers ◽

Cooling Period ◽

Heating And Cooling

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Physical and mechanical characteristics of cement mortars and concretes with addition of clinoptilolite from Beli Plast deposit (Bulgaria), silica fume and fly ash

Clay Minerals ◽

10.1180/claymin.2011.046.2.213 ◽

2011 ◽

Vol 46 (2) ◽

pp. 213-223 ◽

Cited By ~ 6

Author(s):

V. Lilkov ◽

I. Rostovsky ◽

O. Petrov

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Fly Ash ◽

Silica Fume ◽

Mechanical Characteristics ◽

Physical And Mechanical Properties ◽

Specific Pore Volume ◽

Cement Mortars ◽

Physical And Mechanical Characteristics

AbstractCement mortars and concretes incorporating clinoptilolite, silica fume and fly ash were investigated for changes in their physical and mechanical properties. It was found that additions of 10% clinoptilolite and 10% Pozzolite (1:1 mixture of silica fume and fly ash) were optimal for improvement of the quality of the hardened products, giving 8% and 13% increases in flexural and compressive strength respectively. The specific pore volume of the mortars incorporating zeolite decreased between the 28th and 180th day to levels below the values for the control composition due to the fact that clinoptilolite exhibits its pozzolanic activity later in the hydration. In these later stages, pores with radii below 500 nm increased at the expense of larger pores. The change in the pore-size distribution between the first and sixth months of hydration occurs mostly in the mortars with added zeolite.

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Thermal Performance of Resource-Efficient Geopolymeric Mortars Containing Phase Change Materials

The Open Construction and Building Technology Journal ◽

10.2174/1874836801812010217 ◽

2018 ◽

Vol 12 (1) ◽

pp. 217-233

Author(s):

M. Kheradmand ◽

F. Pacheco-Torgal ◽

M. Azenha

Keyword(s):

Phase Change ◽

Thermal Performance ◽

Phase Change Materials ◽

Positive Impact ◽

Performance Testing ◽

Cost Effective ◽

Small Scale ◽

Heating And Cooling ◽

Reduce Emissions ◽

Cooling Loads

Background:Energy efficiency is not only the most cost effective way to reduce emissions but also a way to improve competitiveness and create employment. Geopolymeric mortars containing phase change materials-PCMs have a twofold positive impact concerning eco-efficiency. On one hand, the mortars are based on industrial waste contributing for resource efficiency. And on the other hand, PCM based mortars have the capacity to enhance the thermal performance of the buildings.Objective:This paper reports experimental results on the thermal performance of geopolymeric mortars containing different percentages of phase-change materials-PCMs.Method:Five groups of alkali-activated based mortars with different PCM percentages were produced and placed on a panel within a small scale prototype for thermal performance testing.Results:The results show that the thermal conductivity of the mortars decreased with the increase in the percentage of the PCM.Conclusion:Thermal performance of the PCM based mortars allowed for a stronger attenuation of the temperature amplitudes. Both for heating and cooling loads.

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Study on the Thermal Properties of Paraffin/Expansion Perlite Composite Phase Change Mortar

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.1274 ◽

2011 ◽

Vol 374-377 ◽

pp. 1274-1277 ◽

Cited By ~ 2

Author(s):

Qing Wang ◽

Jing Zhang ◽

Jing Da ◽

Hui Zhao ◽

Kun Ran

Keyword(s):

Mechanical Properties ◽

Thermal Properties ◽

Phase Change ◽

Phase Change Materials ◽

Paraffin Wax ◽

Expanded Perlite ◽

Cooling Process ◽

Heating And Cooling ◽

As Adsorption

Phase change materials were prepared by the paraffin wax as phase change materials and expanded perlite as adsorption carrier in this paper. Phase change mortar was prepared by part of the sand been replaced. The heat ability which adjusts and stores heat in the heating and cooling process with different phase change materials was researched and its mechanical properties were tested and evaluated.

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