The effects of porosity on mechanical behavior and water absorption of an environmentally friendly cement mortar with recycled rubber

2017 ◽  
Vol 151 ◽  
pp. 534-545 ◽  
Author(s):  
Andressa F. Angelin ◽  
Rosa C. Cecche Lintz ◽  
Luísa A. Gachet-Barbosa ◽  
Wislei R. Osório
Keyword(s):  
Mechanical Behavior ◽  
Water Absorption ◽  
Cement Mortar ◽  
Environmentally Friendly ◽  
Recycled Rubber

Incorporation of Iraqi Rocks in the Production of Eco-Friendly Cement Mortar

2020 ◽  
Vol 38 (10A) ◽  
pp. 1522-1530
Author(s):  
Rawnaq S. Mahdi ◽  
Aseel B. AL-Zubidi ◽  
Hassan N. Hashim
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Structural Properties ◽  
Mechanical Milling ◽  
Cement Mortar ◽  
Cement Mortars

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable for construction applications. Kaolin is found to have a greater effect on the mechanical properties, water absorption, and thermal conductivity of the mortars than Flint. This behavior is discussed and analyzed based on the compositional and structural properties of the rocks powders.

Quantifying the anomalous water absorption behavior of cement mortar in view of its physical sensitivity to water

2021 ◽  
Vol 143 ◽  
pp. 106395
Author(s):  
Fangzhou Ren ◽  
Chunsheng Zhou ◽  
Qiang Zeng ◽  
Zhidong Zhang ◽  
Ueli Angst ◽  
...  
Keyword(s):  
Water Absorption ◽  
Cement Mortar ◽  
Anomalous Water

scholarly journals Daya Serap Air dan Kualitas Wadah Semai Ramah Lingkungan Berbahan Limbah Kertas Koran dan Bahan Organik

2018 ◽  
Vol 11 (1) ◽  
pp. 23-34
Author(s):  
Jumadil Akhir ◽  
Allaily Allaily ◽  
Dida Syamsuwida ◽  
Sri Wilarso Budi R
Keyword(s):  
Water Absorption ◽  
Organic Materials ◽  
Environmentally Friendly ◽  
Environmental Problems ◽  
The Other ◽  
Other Hand ◽  
Randomized Design ◽  
Materials Used

Abstrak. Wadah semai ramah lingkungan merupakan produk yang dibuat dari bahan organik. Bahan organik yang digunakan dapat berupa limbah, sehingga dapat membantu mengatasi permasalahan lingkungan dalam menangani limbah. Di sisi lain penggunaan wadah semai ramah lingkungan mempunyai keuntungan yang lebih besar dibandingkan dengan polybag berbahan plastik. Penelitian ini bertujuan untuk mengetahui daya serap air dan kualitas Wadah Semai Ramah Lingkungan (WSRL) berbahan limbah kertas koran dan bahan organik lainnya. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 2 faktor. Hasil penelitian menunjukkan bahwa daya serap air berkisar 171. 04 %-223.69%, dengan nilai tertinggi terdapat pada perlakuan Ab (Koran 100% + 8% perekat) dan terendah terdapat pada perlakuan Ac (Koran 100% + 12% perekat). Penggunaan koran 100% menunjukkan WSRL yang lebih kuat dibandingkan dengan perlakuan lainnya. Water Absorption and Quality of Eco-Friendly Container Waste from Newsprint and Organic Materials Abstract. Organic seedling containers was produced from organic materials. Organic materials used can be waste, so it can help overcome environmental problems in handling waste. On the other hand, the use of organic seeding containers makes the containers more friendly and has greater advantages compared to polybags made from plastic. This study aimed to determine the water absorption and durability of Environmentally Friendly Semi-containers (EFSC) in greenhouses and fields. The design used in this research was complete randomized design with 2 factors. The results showed that water absorption was 171.04% -223.69%, with the highest value found in Ab (100% pulp + 8% glue) treatment and the lowest was in Ac treatment (100% pulp + 12% glue). Using 100% newspapers showed a stronger WSRL compared to other treatments.

scholarly journals Development of Environmentally Friendly Brake Lining Material

2019 ◽  
Vol 120 ◽  
pp. 03005
Author(s):  
I K. Adi Atmika ◽  
IDG. Ary Subagia ◽  
IW. Surata ◽  
IN. Sutantra
Keyword(s):  
Wear Rate ◽  
Water Absorption ◽  
Hybrid Composite ◽  
Environmentally Friendly ◽  
Fixed Temperature ◽  
Brake Pads ◽  
Environment And Health ◽  
Pin On Disc ◽  
Water Absorption Test ◽  
Brake Lining

Materials commonly used as brake pads are asbestos and alloys, but this material is very dangerous to the environment and health. This research was developed to answer these problems, namely to look for alternative brake pads that have good mechanical and structural properties and are environmentally friendly. Brake lining pads material is made from hybrid composite reinforced basalt, shells, alumina and bound using phenolic resin polymer (PR-51510i). This brake pads material is produced through a sintering process with an emphasis of 2000 kg for 30 minutes at a fixed temperature of 160°C. This hybrid composite is made in as many as five variations, each of which is tested for wear resistance using a pin on disc test based on ASTM G 99-95a standards, while destilled water absorption test was based on ASTM D 570-98. The greatest wear rate is 0.000090 g/cm, which is still lower than wear rate of asbestos brake pad materials, and the highest destilled water absorption of the brake pads specimens obtained was 0.041558 still lower than the destilled water absorption of asbestos brake pads.

scholarly journals Prediction of Stress–Strain Curves Based on Hydric Non-Destructive Tests on Sandstones

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3366 ◽  
Author(s):  
Marco Ludovico-Marques ◽  
Carlos Chastre
Keyword(s):  
Physical Properties ◽  
Mechanical Behavior ◽  
Water Absorption ◽  
Analytical Model ◽  
Strain Curve ◽  
Low Pressure ◽  
Design Parameters ◽  
Compression Tests ◽  
Stress Strain ◽  
Non Destructive

The study of the mechanical behavior of building stones is traditionally supported by destructive compression tests carried out on representative specimens. However, in order to respect the monuments’ integrity, the study of the mechanical behavior of stones can be based mostly on physical properties obtained from non-destructive tests (NDT). For this study, a simple and cheap NDT—water absorption under low pressure—was used to carry out fast surveys and to predict the most important design parameters of loadbearing masonry, among which are the compressive strength, strain at failure, and even elastic modulus on monument blocks. The paper presents the results of the experimental work conducted to obtain the physical properties and stress–strain curves of the sandstones tested. Supported by these results, it was possible to correlate the various parameters and develop an analytical model that predicts the stress–strain curve of the sandstones based on water absorption under low pressure tests. A good agreement is observed between the analytical model and the experimental tests.

scholarly journals A Study on Tannery Sludge as a Raw Material for Cement Mortar

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1562 ◽  
Author(s):  
Jurgita Malaiškienė ◽  
Olga Kizinievič ◽  
Viktor Kizinievič
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Cement Mortar ◽  
Ultrasonic Pulse Velocity ◽  
Xrd Analysis ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Raw Material ◽  
Tannery Sludge ◽  
Limit Values

The paper analyses the properties (chemical and mineral composition, microstructure, density, etc.) of recycled tannery sludge (TS) and the possibilities for using it in cement mortar mixture. Mortar specimens containing 3–12% of tannery sludge by weight of cement and 3–9% of tannery sludge by weight of sand were tested. Flowability, density, ultrasonic pulse velocity (UPV), flexural and compressive strength, water absorption and sorptivity of the mortar were analysed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis of tannery sludge and mortar are presented. The tests revealed that replacement of 6% of cement with tannery sludge in the mix increased flexural and compressive strength and UPV values, whereas water absorption decreased. SEM and XRD analysis revealed that specimens with tannery sludge contained lower amounts of ettringite and higher amounts of portlandite; the obtained structure was denser and contained more calcium hydrosilicates (C-S-H). Chromium leaching values in cement mortars were found not to exceed the limit values set forth in Directive 2003/33/EC.

scholarly journals Comparative Analysis of Static and Dynamic Mechanical Behavior for Dry and Saturated Cement Mortar

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3299 ◽  
Author(s):  
Ayyaz Mustafa ◽  
Mohamed A. Mahmoud ◽  
Abdulazeez Abdulraheem ◽  
Sarfaraz A. Furquan ◽  
Ayman Al-Nakhli ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Comparative Analysis ◽  
Mechanical Behavior ◽  
Cement Mortar ◽  
Water Saturation ◽  
Dynamic Compression ◽  
Impact Resistance ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical

Deformational and breakage behaviors of concrete and cement mortar greatly influence various engineering structures, such as dams, river bridges, ports, tunnels, and offshore rig platforms. The mechanical and petrophysical properties are very sensitive to water content and are controlled by the liquid part in pore spaces to a large extent. The objective of this paper is to investigate the water saturation effect on the strength characteristics and deformability of cement mortar under two loading conditions, static and dynamic compression. A set of cement mortar samples was prepared and tested to study the mechanical behavior in dry and saturated states. The first part of the research incorporates the study of static mechanical properties for dry and brine-saturated cement mortar through uniaxial compressive strength tests (UCS). Second, drop-weight impact experiments were carried out to study the dynamic mechanical properties (impact resistance, deformation pattern, and fracture geometry) for dry and saturated cases. The comparative analysis revealed that water saturation caused substantial changes in compressive strength and other mechanical characteristics. Under static loading, water saturation caused a reduction in strength of 36%, and cement mortar tended to behave in a more ductile manner as compared to dry samples. On the contrary, under dynamic loading conditions, water saturation resulted in higher impact resistance and fracture toughness as compared to dry conditions. In addition, fractures could propagate to smaller depths as compared to dry case. The study will help resolve many civil, mining, and petroleum engineering problems where cement structures undergo static as well as dynamic compression, especially in a hydraulic environment where these structures interact with the water frequently. To the best of our knowledge, the effect of water saturation on the dynamic mechanical properties of cement mortar has not been well understood and reported in the literature.

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