scholarly journals Compressive and flexural strength of cement mortar stabilized with raffia palm fruit peel (RPEP)

2015 ◽  
Vol 14 (1) ◽  
pp. 1 ◽  
Author(s):  
IM Aho ◽  
EE Ndububa
Keyword(s):  
Flexural Strength ◽  
Cement Mortar ◽  
Fruit Peel ◽  
Palm Fruit

scholarly journals Preparation of Electric- and Magnetic-Activated Water and Its Influence on the Workability and Mechanical Properties of Cement Mortar

2021 ◽  
Vol 13 (8) ◽  
pp. 4546
Author(s):  
Kaiyue Zhao ◽  
Peng Zhang ◽  
Bing Wang ◽  
Yupeng Tian ◽  
Shanbin Xue ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Cement Paste ◽  
Cement Mortar ◽  
Environmental Issues ◽  
Chemical Admixtures ◽  
Untreated Water ◽  
Alternating Voltage

Cement-based materials prepared with activated water induced by a magnetic field or electric field represent a possible solution to environmental issues caused by the worldwide utilization of chemical admixtures. In this contribution, electric- and magnetic-activated water have been produced. The workability and mechanical properties of cement mortar prepared with this activated water have been investigated. The results indicate that the pH and absorbance (Abs) values of the water varied as the electric and magnetic field changed, and their values increased significantly, exhibiting improved activity compared with that of the untreated water. In addition, activated water still retains activity within 30 min of the resting time. The fluidity of the cement paste prepared with electric-activated water was significantly larger than that of the untreated paste. However, the level of improvement differed with the worst performance resulting from cement paste prepared with alternating voltage activated water. In terms of mechanical properties, both compressive strength and flexural strength obtained its maximum values at 280 mT with two processing cycles. The compressive strength increased 26% as the curing time increased from 7 days to 28 days and flexural strength increased by 31%. In addition, through the introduction of magnetic-activated water into cement mortar, the mechanical strength can be maintained without losing its workability when the amount of cement is reduced.

scholarly journals Properties of Calcium Sulfoaluminate Cement Mortar Modified by Hydroxyethyl Methyl Celluloses with Different Degrees of Substitution

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2136
Author(s):  
Shaokang Zhang ◽  
Ru Wang ◽  
Linglin Xu ◽  
Andreas Hecker ◽  
Horst-Michael Ludwig ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Bond Strength ◽  
Cement Mortar ◽  
Retention Rate ◽  
Methyl Cellulose ◽  
Tensile Bond Strength ◽  
Calcium Sulfoaluminate Cement ◽  
Calcium Sulfoaluminate ◽  
Cement Mortars

This paper studies the influence of hydroxyethyl methyl cellulose (HEMC) on the properties of calcium sulfoaluminate (CSA) cement mortar. In order to explore the applicability of different HEMCs in CSA cement mortars, HEMCs with higher and lower molar substitution (MS)/degree of substitution (DS) and polyacrylamide (PAAm) modification were used. At the same time, two kinds of CSA cements with different contents of ye’elimite were selected. Properties of cement mortar in fresh and hardened states were investigated, including the fluidity, consistency and water-retention rate of fresh mortar and the compressive strength, flexural strength, tensile bond strength and dry shrinkage rate of hardened mortar. The porosity and pore size distribution were also analyzed by mercury intrusion porosimetry (MIP). Results show that HEMCs improve the fresh state properties and tensile bond strength of both types of CSA cement mortars. However, the compressive strength of CSA cement mortars is greatly decreased by the addition of HEMCs, and the flexural strength is decreased slightly. The MIP measurement shows that HEMCs increase the amount of micron-level pores and the porosity. The HEMCs with different MS/DS have different effects on the improvement of tensile bond strength in different CSA cement mortars. PAAm modification can improve the tensile bond strength of HEMC-modified CSA cement mortar.

Cement mortar with enhanced flexural strength and durability-related properties using in situ polymerized interpenetration network

2021 ◽  
Vol 15 (1) ◽  
pp. 99-108
Author(s):  
Qing Liu ◽  
Renjun Liu ◽  
Qiao Wang ◽  
Rui Liang ◽  
Zongjin Li ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Cement Mortar ◽  
Strength And Durability

Development of Nanocement Mortar as a Construction Material

2013 ◽  
Vol 795 ◽  
pp. 684-691 ◽  
Author(s):  
Wail N. Al-Rifaie ◽  
Omar Mohanad Mahdi ◽  
Waleed Khalil Ahmed
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Cement Mortar ◽  
Construction Material ◽  
Modulus Of Rupture ◽  
Early Stages

The present research examined the compressive and flexural strength of nanocement mortar by using micro cement, micro sand, nanosilica and nanoclay in developing a nanocement mortar which can lead to improvements in ferrocement construction. The measured results demonstrate the increase in compressive and flexural strength of mortars at early stages of hardening. In addition, the influence of heating on compressive strength of cement mortar. General expressions to predict the compressive strength, modulus of rupture for the developed nanocement mortar in the present work are proposed.

An Investigation on Effect of Oil Palm Shell Ash on Flexural Strength and Compressive Strength of Cement Mortar

2014 ◽  
Vol 894 ◽  
pp. 55-59
Author(s):  
Abdoullah Namdar ◽  
Fadzil Mat Yahaya ◽  
Kok Jun Jie ◽  
Lim Yen Ping
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Oil Palm ◽  
Cement Mortar ◽  
Fine Sand ◽  
Time To Failure ◽  
Palm Shell ◽  
Oil Palm Shell ◽  
Negative Effect ◽  
Palm Oil Mill

One of waste agriculture materials is oil palm shell ash. It has been producing in high quantity in palm oil mill, and for storage of that an investment requires. In this paper, an attempt has been made to analysis effect of oil palm shell ash on compressive and flexural strength of cement mortar. The compressive strength and flexural strength of cement mortar has been measured. To improve accuracy of work 50% cement and 50% fine sand has been proposed in cement mortar mix design. The results have been indicated that the effect of OPS ash on flexural and compressive strength of cement mortar is not same. The deflection, load sustainability and time to failure for compressive strength have independent fluctuation of flexural strength. The positive and negative effect of OPS ash on mechanical properties of cement mortar has been observed. The morphology of crack failure has not been investigated. The work can be continued with many waste agriculture materials. Keywords: waste agriculture, deflection, load sustainability, time to failure.

scholarly journals Bio-pellets Manufacture from Palm Fruit Skin as Renewable Alternative Fuels in Updraft Type Gasification Furnaces

2020 ◽  
Vol 15 (6) ◽  
pp. 913-920
Author(s):  
Ridwan Abdurrahman ◽  
Radja Masyita Aulya Syafitri ◽  
Abrar Ridwan ◽  
Lega Putri Utami
Keyword(s):  
Alternative Fuels ◽  
Raw Materials ◽  
Combustion Efficiency ◽  
Fruit Peel ◽  
Biomass Waste ◽  
Palm Fruit ◽  
Suitable Alternative ◽  
Average Value ◽  
Fruit Skin ◽  
Prior Processing

Biomass is a suitable alternative to be used as fuel, but the use of biomass without prior processing can cause respiratory disease. In Indragiri Hilir Regency, the utilization of palm fruit skin waste is still minimal. Bio-pellet is a fuel derived from biomass waste that has gone through a densification process. The process of making bio-pellets is carried out by refining the raw materials, mixing the adhesives, printing the raw materials that are pressed under high pressure, and drying. The results of the research on the bio-pellet characteristic test of Nipah fruit peel waste according to its parameters obtained an average value of 1.28% water content, 0.51% ash content, 21.3% flying substance content, 76.88% bound carbon content and weight. type 1.41 gr / cm3. For the combustion test in the updraft type gasification furnace with the addition of 0.5kg, 0.3kg and 0.2kg of fuel, the results obtained from the rate of fuel consumption are 0.041kg / minute, 0.033kg / minute and 0.033kg respectively. /minute. In the results of combustion efficiency, the value according to SNI 7926: 2013 is the addition of 0.5kg of fuel at the beginning of ignition and 0.2 kg at the end of ignition, which is 0.04.

scholarly journals Experimental study on high temperature mechanical properties of aluminate cement mortar mixed with fiber

2021 ◽  
Vol 25 (6 Part B) ◽  
pp. 4441-4448
Author(s):  
Ping Xu ◽  
Dong Han ◽  
Jian-Xin Yu ◽  
Yu-Hao Cui ◽  
Min-Xia Zhang
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Flexural Strength ◽  
Volume Fraction ◽  
Cement Mortar ◽  
Steel Fibers ◽  
Basalt Fibers ◽  
High Temperature Mechanical Properties ◽  
Micro Structures ◽  
Aluminate Cement

The aim of the present paper is to study the mechanical properties of aluminate cement mortar mixed with different chopped fibers under high temperature. The specimens with a size of 40 mm ? 40 mm ? 160 mm is treated at various tempera?tures of 25?C, 200?C, 400?C, 600?C, and 800?C. The compressive and flexural strength of the aluminate cement mortar and its micro-structures are tested. The results show that the chopped steel fibers and basalt fibers are effective in improv?ing the high temperature mechanical properties of aluminate cement mortar. When the volume fraction of chopped steel fibers is 2%, the compressive strength and flexural strength of the test block treated at the temperature of 800?C increase by 18.3% and 128.6%, respectively.

Some Properties of Cement Mortar Incorporating Micro and Nano-Metakaolin Materials

2021 ◽  
Vol 1021 ◽  
pp. 231-240
Author(s):  
Manolia Abed Al-Wahab Ali ◽  
Mohammed Jawad Kadhim ◽  
Ibtesam F. Nasser
Keyword(s):  
Flexural Strength ◽  
Greenhouse Gas Emission ◽  
Cement Mortar ◽  
Physical And Mechanical Properties ◽  
Pozzolanic Reaction ◽  
Mineral Admixture ◽  
Concrete Technology ◽  
Binder Ratio ◽  
Substitution Ratio ◽  
High Production

There are many reasons neededfor continuous evolution in concrete technology; one of them concern on the greenhouse gas emission and depletion of natural resource as a results of high production of Portland cement. Many solutions are used to solve these problems; one of them is using cement replacement materials in concrete like metakaolin (in micro or Nano scale) which offered positive effect on the properties of cement concrete. Therefore, the main aim of this study is to evaluate and compare the effects of metakaolin (MK) and Nano-metakaolin (NMK) on some physical and mechanical properties of cement mortar. For this purpose, mortar mixes are prepared by substituting cement (by weight) with (10%) metakaolin or (1, 3, 5, and 7%) Nano - metakaolin. The amount of binder for mortar mixtures is 700 kg/m with a constant water / binder ratio of 0.33. Workability, apparent density, water absorption, compressive strength, and flexural strength of all mortar mixes are determined and compared with reference mix without any mineral admixture (0% MK or NMK). The results indicated that the performance of mortar mixes can be enhanced by metakaoline replacement. Furthermore, Nano-metakaolin has significantly positive impacts on the properties of mortar mixes which have found to be improved with increasing the Nano-metakaolin replacement, due to better pore refinement, micro filling action, and higher pozzolanic reaction. The optimum Nano-metakaolin substitution ratio (7%) causes increase in compressive and flexural strength reach to (82.6% and 59.5%), respectively compared with the reference mix, at age of 28 days.

Strength and Porosity of Cement Mortar Blended with Metakaolin

2013 ◽  
Vol 838-841 ◽  
pp. 142-147 ◽  
Author(s):  
Jamilu Usman ◽  
Abdul Rahman Mohd Sam ◽  
Salihuddin Radin Sumadi
Keyword(s):  
Experimental Investigation ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Cement Mortar ◽  
Quantitative Relationship ◽  
Experimental Results

An experimental investigation was carried out to assess the effect of metakaolin (MK) on the compressive strength, flexural strength and porosity of cement mortar. The cement was partially substituted with MK at 0-30% replacement levels. The results show that the strengths and porosity of mortar containing up to 20% were superior to that of control (0% MK). The Balshin equation fits the experimental results of compressive strength and porosity of the specimens containing MK and there is a strong quantitative relationship between compressive strength and porosity of the specimens.

Mechanics Performance of Cement Mortar Modified by Carboxylic Styrene Butadiene Latex

2014 ◽  
Vol 908 ◽  
pp. 141-144
Author(s):  
Jun Qiang Wang
Keyword(s):  
Flexural Strength ◽  
Cement Mortar ◽  
Adhesion Test ◽  
Splitting Test ◽  
Mechanics Performance ◽  
Before And After ◽  
Improvement Effect ◽  
Dynamic Modulus Test ◽  
Styrene Butadiene ◽  
Polymer Latex

In order to improve the performance of cement mortar, using compression test, flexural strength test, splitting test, adhesion test and dynamic modulus test, the improvement effect of carboxylic styrene butadiene latex on the mechanical properties of cement mortar was explored, Research results showed that with the increases the polymer-cement ratio, the flexural strength, compressive strength, splitting strength and adhesive strength of mechanism mortar of modified cement mortar all increase, and the dynamic elastic modulus decreases. Carboxylic styrene butadiene latex enhances the flexibility and anti-deforming capability of cement mortar, thereby also improves the pavement performance. The results clarify the properties variation law of cement mortar before and after modification, this provides scientific guidance for polymer latex modified cement mortar mix design.

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