Results 11 to 20 of about 252,041 (249)

A Study Mechanical Properties of Epoxy Resin Cured at Constant Curing Time and Temperature with Different Hardeners [PDF]

open access: yesEngineering and Technology Journal, 2011
In this study, a low molecular weight epoxy resin diglycidyl ether of bisphenol A (DGEBA) is cured isothermally with an aliphatic and aromatic amine hardeners separately. (1) Triethylenetetramine (TETA), (2) diamino diphenylmethane (DDM).
Najat j. Saleh   +3 more
doaj   +1 more source

Uncracked Palm Kernel Shell Effect on Compressive Strength of Concrete [PDF]

open access: yesEngineering and Technology Journal, 2023
In recent times, the production of concrete has become a significant concern due to the rapid population growth and the depletion of raw materials. In this research, we investigated the use of Uncracked Palm Kernel Shell (UPKS) as a replacement for ...
Chidiebere Ezenkwa, Thaddeus Elogu
doaj   +1 more source

Effect of Microstructure Evolution on Thermal Conductivity of Alloy 690 [PDF]

open access: yesTeshugang
The effect of microstructure evolution on thermal conductivity of alloy 690 electrode was studied according to the working conditions of electrode materials in Joule furnace.
Feng Han, Zhu Yongchang, Song Zhigang, Gu Yang, Liu Zhe, Yang Debo
doaj   +1 more source

Organizational and technological solutions for controlling concrete structures projects in the dry hot weather in Iraq [PDF]

open access: yesBIO Web of Conferences
Iraq has suffered from a long period of neglect in projects due to the circumstances it has experienced, and there is a great need to construct infrastructure and development projects.
Al-Asadi Laith S.M.   +2 more
doaj   +1 more source

Effects of Ethylene and 1-Methylcyclopropene on the Quality of Sweet Potato Roots during Storage: A Review

open access: yesHorticulturae, 2023
Sweet potato (Ipomoea batatas (L.) Lam.) is served as an important root crop worldwide due to its high yield, strong adaptability and nutrient richness. Sweet potato has played a significant role in ensuring food security and family income opportunities ...
Jingjing Kou   +6 more
doaj   +1 more source

Physicochemical and radiological characterization of kaolin and its polymerization products

open access: yesMateriales de Construccion, 2018
The aim of this study was determination of physical-chemical and radiological characteristics of kaolin and products of alkali-activated thermally treated kaolin (geopolymer).
M. Ivanović   +6 more
doaj   +1 more source

The influence of the curing conditions of concrete on durability after freeze-thaw accelerated testing

open access: yesMateriales de Construccion, 2015
This work relates the curing conditions of concrete with the damage caused by rapid freeze-thaw cycles (ASTM C 666). The “potential” durability of concrete after testing is also studied.
G. Al-Assadi   +4 more
doaj   +1 more source

Pengaruh Penambahan Quartz Powder pada Reactive Powder Concrete terhadap Terbentuknya Kalsium - Silikat - Hidrat

open access: yesJurnal Teknik Sipil, 2013
Penelitian yang dilakukan adalah menjelaskan mengenai penggunaan quartz powder dalam reactive powder concrete (RPC) terutama pengaruhnya terhadap struktur mikro dan kuat tekan. Dalam desain campuran RPC, selain menentukan jumlah material yang digunakan,
Widodo Kushartomo   +3 more
doaj   +1 more source

Automatic Pressure Gelation Analysis for Insulating Spacer of Gas Insulated Switchgear Manufactured by Bio-Based Epoxy Composite

open access: yesApplied Sciences, 2022
In the case of the existing power equipment business, a variety of insulation and accessories is manufactured with petroleum-based epoxy resins. However, as petrochemical resources are gradually limited and concerns about the environment and economy grow,
Chanyong Lee   +6 more
doaj   +1 more source

Early-Age Cracking in Concrete: Causes, Consequences, Remedial Measures, and Recommendations

open access: yesApplied Sciences, 2018
Cracking is a common problem in concrete structures in real-life service conditions. In fact, crack-free concrete structures are very rare to find in real world.
Md. Safiuddin   +3 more
doaj   +1 more source

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