scholarly journals Mechanical properties of the gypsum composite reinforcement with wooden fibers

2019 ◽  
Vol 10 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Markéta Hošťálková ◽  
Nikola Vavřínová ◽  
Veronika Longauerová
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Shear Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Building Materials ◽  
Strength Properties ◽  
Physical Parameters ◽  
Fibrous Materials ◽  
Mechanical And Physical Properties

The gypsum is one of the most often used materials in the civil engineering. Very often it is applied in the form of plasterboards without any reinforcement, for example, cladding boards are unusable as supporting construction. To improve the mechanical properties of plasterboards, fibrous materials such as cellulose or glass fiber are added. Reinforcement of gypsum with fibers improves in particular the flexural and shear strength. The main purpose of the research is to clarify whether natural wooden fibers could be used as the reinforced of composite gypsum building materials. Wooden fibers are used as a blown or board thermal insulation. This article presents the results of tests aimed at determining the mechanical and physical properties of gypsum composite reinforced with wooden fibers. The effect of the reinforcement on the strength properties as a compressive strength, flexural strength was verified on a series of test specimens. The results of the tests have shown that the reinforcing of gypsum composite has an impact on the mechanical-physical parameters.

scholarly journals The effect of adding natural wastes on some properties of gypsum: تأثير إضافة المخلفات الطبيعية على بعض خواص الجبس

2021 ◽  
Vol 5 (5) ◽  
pp. 77-65
Author(s):  
Alaa Ahmad Zohir Kattan, Nada Altonji, Fatima Alsaleh Alaa Ahmad Zohir Kattan, Nada Altonji, Fatima Alsaleh
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Thermal Insulation ◽  
Building Materials ◽  
Reference Sample ◽  
Basic Material ◽  
Mechanical And Physical Properties ◽  
Peanut Shells

In this research, the effect of adding some natural wastes to gypsum was studied in order to use them as thermal insulation materials in buildings and to recycle these wastes. Thermal insulation panels were installed from gypsum (as a basic material) and natural wastes (sawdust, peanut shells, wheat straw, cottonwood) at percentages (10, 15, 20) %, and some of their mechanical and physical properties, and their thermal conductivity were studied. The results indicated an improvement in some properties of gypsum after adding wastes, and obtaining thermal building materials that have better properties than the reference sample (gypsum) in some cases. Rough sawdust samples (SdR15, SdR20) achieved the highest compressive strength exceeding (4MPa). The flexural strength was for peanut shells samples (P10:1.76 MPa, P15:1.8 MPa), while the most efficient samples as thermal insulation were ground straw and smooth sawdust samples (SdS15, SdS20, GSt15, GSt20) where their thermal conductivity was (0.194-0.141W/m.K), which makes it acceptable according to the Syrian thermal insulation code.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

scholarly journals Effect of firing temperature on physico-mechanical properties of contemporary clay brick productions in Lalitpur, Nepal

2020 ◽  
Vol 55 (1) ◽  
pp. 43-52 ◽  
Author(s):  
NB Bohara ◽  
DB Ghale ◽  
YP Chapagain ◽  
N Duwal ◽  
J Bhattarai
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Bulk Density ◽  
Firing Temperature ◽  
Apparent Porosity ◽  
Clay Brick ◽  
Mechanical And Physical Properties ◽  
Fired Bricks ◽  
Maximum Compressive Strength

Effect of firing temperature on some physico-mechanical properties of ten brick samples, those were composed by feldspars, quartz, alumina-rich spinel, primary mullite and hematite phases, was investigated in accordance with ASTM standards. The brick samples fired between 700° to 1100° C showed 11-23 % water adsorptivity (WA), 19-37 % apparent porosity (AP) and 1.50-1.65 g/cm3 bulk density (BD) indicate good physical properties. The maximum compressive strength (CS) of the fired-bricks at 950° to 1000° C was found to be between 15.6 and 17.1 MPa. At 700°-1000° C firing temperatures, the CS of these bricks is found to be increased exponentially with decreasing of both WA and AP, however it is found to be increased with increasing the BD. Consequently, it can be said that there is good correlation between mechanical and physical properties of the fired-brick samples up to the firing temperature of 1000° C. Bangladesh J. Sci. Ind. Res.55(1), 43-52, 2020

Preparation of Sulfoaluminate Cement Using Industrial Waste Residue

2011 ◽  
Vol 396-398 ◽  
pp. 380-385
Author(s):  
Lei Wang ◽  
Ye Wang ◽  
Tian Hua Yang ◽  
Run Dong Li
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Flexural Strength ◽  
Physical Properties ◽  
Industrial Waste ◽  
Sintering Temperature ◽  
Setting Time ◽  
Cement Clinker ◽  
Environmental Technology

Large amount of emissions from industrial waste residue to the environment has caused serious pollutions. Utilization way to using industrial waste residue preparing sulfoaluminate cement (SAC) is got much attention of scholars both at home and abroad. It summarized the present researches for preparation of SAC from industrial waste residue (IWR). Sintering temperature, mineral composition, physical properties (fineness, standard viscosity, setting time), mechanical properties (compressive strength, flexural strength) and corrosion resistance of cement clinker were analyzed. Preparation of SAC clinker using IWR is a very promising environmental technology.

General Performance of Sulfonic Group Modified Polycarboxylate-Type Superplasticizer

2011 ◽  
Vol 396-398 ◽  
pp. 2375-2378
Author(s):  
Yan Lin Sun ◽  
Hong Wang ◽  
Hui Xiang Du ◽  
Yun Hua Huang
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Cement Paste ◽  
Strength Properties ◽  
Carboxyl Group ◽  
Strength Ratio ◽  
Sulfonic Group ◽  
Group Content ◽  
General Performance

The polycarboxylate-type superplasticizers (PCS) modified by sulfonic group were prepared. The influence of sulfonic group content on the performance of cement admixtures when using sulfonic group modified PCS was discussed. Some physical properties such as dispersion, cement paste fluidity, mortar fluidity, compressive strength ratio and flexural strength ratio were investigated. The results show that when using PCS with sulfonic group content 20%~25% (mol/mol of total carboxyl group), the dispersion and fluidity of concrete can be distinctly improved, meanwhile the strength properties can be maintained.

scholarly journals Pengaruh Abu Cangkang Sawit Terhadap Kuat Tekan Dan Kuat Lentur Batubata

2018 ◽  
Vol 3 (1) ◽  
pp. 61
Author(s):  
Herman . ◽  
Rolly I
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Water Content ◽  
Strength Test ◽  
Basic Material ◽  
Dry Density ◽  
Soil Mixture ◽  
Palm Shell

This research was conducted to increase the value of compreive strength by adding palm shell ash to the base soil of brick. The palm oil shell was got from the result of the disposal of  Incasari Raya Factory Damasraya. The soil as the basic material of the brick was got from the brick’s manufactory Gunung Sariak Padang. The persentage of palm shell ash in the soil mixture was 0%, 5%, 15% and 25% from the soil dry weight. The test consisted of physical properties test and mechanical properties test. The physical properties test consisted of water content test, spesific gravity test, Atterberg limit test, and grain size analysis test.The mechanical properties test consisted of compaction test, compressive strength test and flexural strength test. The water content in manufacture brick was 0,85% γd maximum on wet side optimum of the soi. All the process of the brick is manufactured with manual fabrication. The result of the test showed that the values of spesific gravity (Gs), plastic limit (PL), shrinkage limit (SL),maximum dry density, optimum of water content, and compressive strength of brick increased. Mean while the liquid limit (LL),passing of sieve no. 200 in three days care, plastic index (PI), decreased. For flexural strength, at first increased, along with addition percentage from palm shell ash, this value inclined decreased. The optimum result was got 5%        palm shell ash in the soil mixture.

scholarly journals Effect of Fiber Reinforcement on the Compression and Flexural Strength of Fiber-Reinforced Geopolymers

2021 ◽  
Vol 11 (21) ◽  
pp. 10443
Author(s):  
Michał Łach ◽  
Bartłomiej Kluska ◽  
Damian Janus ◽  
Dawid Kabat ◽  
Kinga Pławecka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Building Materials ◽  
Bending Strength ◽  
Strength Properties ◽  
Attractive Alternative ◽  
Reinforcing Fibers ◽  
Different Types ◽  
The Matrix ◽  
Glass Carbon

This work aimed to determine the effect of the addition of different types of reinforcing fibers on the strength properties of geopolymers such as flexural and compressive strength. Geopolymers are an attractive alternative to conventional binders and building materials; however, one of the main problems of their widespread use is their low resistance to brittle fracture. To improve the mechanical properties, reinforcement in the form of glass, carbon, and basalt fibers (as grids) was applied to geopolymers in the following work. Additionally, composites with these fibers were produced not only in the matrix of pure geopolymer but also as a hybrid variant with the addition of cement. Furthermore, basalt grids were used as reinforcement for geopolymers not only based on ash but also metakaolin. An additional variable used in the study was the molar concentration of the alkali solution (5 M and 10 M) for the different types of geopolymer samples. The mechanical properties of geopolymer materials and geopolymer–cement hybrids are the highest when reinforcement in the form of carbon fiber is used. Strength values for geopolymers reinforced with basalt mats depend on the number of reinforcement layers and the concentration of the alkaline solution used. All produced composites were tested for compressive strength and bending strength. When using basalt mesh, it was possible to achieve a bending strength of 12 MPa. The highest compressive strength that was achieved was the value of 66 MPa, while for samples not reinforced with fibers, only about 40 MPa was achieved.

scholarly journals Optimization of compaction pressure on brick

2018 ◽  
Vol 215 ◽  
pp. 01025
Author(s):  
Ade Indra ◽  
Edison Edison ◽  
Hendri Nofrianto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Building Materials ◽  
Compaction Pressure ◽  
Quality Standards ◽  
Ceramic Materials ◽  
Suction Rate

Bricks are one of the building materials that serves as a wall or anchoring the load. Therefore, it must be made according to the standards. In our previous observations, many found bricks were traditionally not quality, because the process of making bricks that are not right. Bricks are a class of ceramic materials that must be hard and should not be crushed when immersed in water. The method in this study focuses on optimizing compaction pressures, with printed pressures that are varied in MPa units. The results obtained as follows, in terms of mechanical properties of Compressive Strength increases with the addition of compaction pressure, an increase of 36% (brick becomes strong). In terms of physical properties of Density increased (porosity becomes smaller). For Suction rate down, this shows less water absorption. The results obtained in accordance with national and international quality standards.

The Effect of Bioglass Addition on Mechanical and Physical Properties of Photoactive UDMA-TEGDMA Resin Composites

2013 ◽  
Vol 587 ◽  
pp. 215-221 ◽  
Author(s):  
Laura C. Nicolae ◽  
Richard M. Shelton ◽  
Paul R. Cooper ◽  
Richard A. Martin ◽  
William M. Palin
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Physical Properties ◽  
Silicate Glass ◽  
Near Infrared ◽  
Resin Composites ◽  
Strength Tests ◽  
Mechanical And Physical Properties ◽  
Size And Morphology ◽  
45S5 Bioglass

The effect of Bioglass addition on mechanical and physical properties of photoactive UDMA-TEGDMA resin composites Laura Nicolae, William Palin, Richard Shelton, Paul Cooper Aim: To determine the effect of Bioglass incorporation on the polymerisation rate (Rp), degree of conversion (DC), flexural strength and modulus (FS/FM) of light-curable filled resin composites (FRCs). Methods: Experimental photoactive resins containing various UDMA-TEGDMAratios and filled with non-silanised irregular or spherical 45S5-Bioglass (50μm; 5-40mass%) and/or silanised silicate glass filler particulates (0.7μm; 50-70mass%) weretested. Rp and DC wereanalysed by real-time near-infrared spectroscopy. FS/FM of resins and FRCs were determined using three-point flexural strength tests. Results: Addition of up to 20mass%45S5-Bioglass filler significantly increased DC and FS(p<0.05), although >20mass% had deleterious effects on mechanical properties. The addition of spherical Bioglass particles resulted in an increased DC compared with that of irregular filler morphology although no significant differences mechanical properties were observed (p>0.05). Conclusion: Addition of 45S5-Bioglass with specific filler content, size and morphology resulted in enhanced mechanical and physical properties compared with conventional silicate glass FRCs.

Research on the Effects of Calcination Temperature on the Physical Properties of Titanium Gypsum

2014 ◽  
Vol 711 ◽  
pp. 189-192
Author(s):  
Yan Liu ◽  
Guo Zhong Li ◽  
Chuan Wei Du
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Calcination Temperature ◽  
Physical Effects

This paper studies the different calcination temperature on the properties of titanium gypsum physical effects, and the mechanism of the effects are discussed in this paper. Research has shown that with the increase of calcination temperature, the mechanical properties of titanium gypsum present a trend of after rising first down. When the calcination temperature is 180 °C, titanium gypsum calcined product mainly for the half water gypsum phase, the mechanical strength of samples of titanium gypsum achieve maximum at this time, The mechanical properties of titanium gypsum samples: 2h flexural strength was 0.94MPa, 2h compressive strength was 1.87MPa, absolutely dry flexural strength was 1.54 MPa and absolutely dry compressive strength was 2.52 MPa.

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