Sanjay Pareek
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View article: Electrode design of energy storage concrete devices for improving energy storage and cyclic performance
Electrode design of energy storage concrete devices for improving energy storage and cyclic performance Open
As the development of energy storage concrete devices (ESCs) is still nascent, their electrochemical properties remain largely unknown. Elucidation of the basic mechanism of ESCs will lead to the establishment of general-purpose design tec…
View article: Development of low-cost rolling base isolation system for seismic protection of rubble stone masonry buildings in Himalayan Mountain range
Development of low-cost rolling base isolation system for seismic protection of rubble stone masonry buildings in Himalayan Mountain range Open
A low-cost rolling base isolation system (RBIS) for rubble stone masonry buildings in the Himalayan mountain range was presented and the feasibility of RBIS in the initial conditions installed in the buildings were evaluated in experiments…
View article: Feasibility of sliding base isolation for rubble stone masonry buildings in the Himalayan Mountain range
Feasibility of sliding base isolation for rubble stone masonry buildings in the Himalayan Mountain range Open
This paper studied the feasibility of a sliding base isolation layer to be used in rubble stone masonry buildings in rural areas in the Himalayan Mountain range to provide robust protection to important building like schools against strong…
View article: CARBONATION MODEL OF HARDENED CONCRET SUBJECTED TO HIGH-PRESSURE CO<sub>2</sub> ENVIRONMENT
CARBONATION MODEL OF HARDENED CONCRET SUBJECTED TO HIGH-PRESSURE CO<sub>2</sub> ENVIRONMENT Open
本研究では、高圧かつ高濃度のCO2環境下における普通コンクリートの炭酸化進行の評価方法を構築する目的で、Fickの拡散式に基づく炭酸化進行のモデル化を行った。モデルの検証のため、コンクリートの配合や炭酸化開始材齢が異なる試験体を作製し、CO2濃度100%、0.5MPa及び1.0MPaの圧力下で促進炭酸化試験を行った。炭酸化試験の期間と炭酸化深さ、炭酸化速度や炭酸化に伴う質量変化の実験結果について、モデルにより算定した結果と比較した。その結果、モデルにより算定した炭酸化速度係…
View article: Evaluation of the Thermal Performance of Fly Ash Foam Concrete Containing Phase Change Materials (PCMs)
Evaluation of the Thermal Performance of Fly Ash Foam Concrete Containing Phase Change Materials (PCMs) Open
The aim of this study was to assess the characteristics of fly ash foam concrete containing two varying temperature ranges of microencapsulated phase change materials (PCMs): PCM28D (26–30 °C) and PCM43D (41–45 °C). In total, five differen…
View article: CARBONATION OF HARDENED CONCRETE USING HIGH-PRESSURE INJECTION CHAMBER
CARBONATION OF HARDENED CONCRETE USING HIGH-PRESSURE INJECTION CHAMBER Open
本研究では、普通コンクリートにCO2を固定化する方法やその評価方法を確立することを目的とし、高圧注入試験装置を用いて硬化コンクリート試験体に高濃度のCO2を0.5MPa及び1.0MPaの圧力で注入した際の炭酸化深さや炭酸化速度係数について調べた。その結果、圧力が高いケースほど炭酸化速度は大きくなり、また高圧による細孔組織への影響は無く、炭酸化により空隙率が低下してコンクリートの強度が増加することが分かった。更に、Fick則を用いた炭酸化進行のモデルを用いて、高濃度高圧下にお…
View article: MASS CHANGE OF HARDENED CONCRETE DUE TO CARBONATION BY USING HIGH-PRESSURE INJECTION CHAMBER
MASS CHANGE OF HARDENED CONCRETE DUE TO CARBONATION BY USING HIGH-PRESSURE INJECTION CHAMBER Open
本研究では、普通コンクリートにCO2を固定化する方法やその評価方法を確立することを目的とし、その基礎的な研究として耐圧容器を用いた高圧注入試験装置により、硬化コンクリート試験体に高濃度のCO2を0.5MPa及び1.0MPaの圧力で注入して促進炭酸化試験を行った。また、合わせて炭酸化プロセスに伴う質量変化を測定した。炭酸化深さと質量増加率の関係として整理した結果、炭酸化進行に伴って線形的に質量が増加することが分かり、質量変化の測定が炭酸化進行の評価方法の一つとして有効であるこ…
View article: Experimental Study on the Development of Fly Ash Foam Concrete Containing Phase Change Materials (PCMs)
Experimental Study on the Development of Fly Ash Foam Concrete Containing Phase Change Materials (PCMs) Open
Phase change materials (PCMs) have the ability to absorb and release a large amount of energy during the process of transforming physical properties (i.e., phase transition process). PCMs are suitable for thermal energy storage and reducin…
View article: Chemical Resistance of Cu-Al-Mn Superelastic Alloy Bars in Acidic and Alkaline Environments
Chemical Resistance of Cu-Al-Mn Superelastic Alloy Bars in Acidic and Alkaline Environments Open
Recently, single-crystal Cu-Al-Mn (CAM) superelastic alloy (SEA) bars have been developed to address the shortcomings of traditional Ni-Ti SEA bars, i.e., high cost, low workability, and lack of superelasticity at low temperatures. The CAM…
View article: Reaction, Phases, and Microstructure of Fly Ash-Based Alkali-Activated Materials
Reaction, Phases, and Microstructure of Fly Ash-Based Alkali-Activated Materials Open
The alkaline activator has a significant effect on the microstructure and mechanical properties of fly ash-based alkali activated products. This paper aims to identify the reaction products of fly ash (FA) activated with alkaline activator…
View article: Adhesion characteristics of geopolymer mortar to concrete and rebars
Adhesion characteristics of geopolymer mortar to concrete and rebars Open
In recent years, geopolymers have gained a wide attention as highly ecological-friendly building materials, having a capability to cut down 70% of CO 2 emissions in comparison to the ordinary cement concrete. In this study, geopolymer mort…
View article: Evaluation of Fire-Performance by Cone-Calorimeter Tests and Thermal Conductivity of Polymer-Modified Mortars and Various Concretes
Evaluation of Fire-Performance by Cone-Calorimeter Tests and Thermal Conductivity of Polymer-Modified Mortars and Various Concretes Open
In this study, experimental study is carried out in order to understand the behavior of various concretes and mortars under elevated temperatures with emphasis on thermal conductivity of each type of material during fire.The reaction to fi…