CEMENT BUILDING MATERIALS WITH POWDERED OPTICAL DISCS AS A FILLER

The object of study is a cement composite material with powdered utilized optical discs. The objective is to establish the dependences of the main strength characteristics – compressive strength, bending strength, and density – on the amount of waste added into the mixture and the water-cement ratio. The compositions of the mixtures for the production of the cement composite material samples consisted of the following components: cement, sand, powdered waste in the form of utilized optical discs and water. Based on the results of testing the samples, mathematical models have been developed which describe the dependences of the physical and mechanical properties of the cement composite material samples on the fraction of waste and water-cement ratio. It was found that with an increase in the amount of powdered waste added into the mixture, it reduces the compressive strength, bending strength, and density of the samples under study, however, the optimization of the water-cement ratio makes it possible to obtain equal strength compositions with a different fraction of waste. Component compositions of cement composite material mixtures with the addition of powdered utilized optical discs in the amount of 10 to 25 % of the total filler mass, which can provide construction products with a compressive strength class B20, are presented.

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Cement Building Materials with Powdered Optical Discs as a Filler

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.887.415 ◽

2021 ◽

Vol 887 ◽

pp. 415-421

Author(s):

V. Ezerskiy ◽

N.V. Kuznetsova ◽

A.D. Seleznev

Keyword(s):

Compressive Strength ◽

Composite Material ◽

Building Materials ◽

Bending Strength ◽

Physical And Mechanical Properties ◽

Cement Composite ◽

Cement Ratio ◽

Water Cement Ratio ◽

Optical Discs ◽

Filler Mass

The object of study is a cement composite material with powdered utilized optical discs. The objective is to establish the dependences of the main strength characteristics – com-pressive strength, bending strength, and density – on the amount of waste added into the mix-ture and the water-cement ratio.The compositions of the mixtures for the production of the cement composite material samples consisted of the following components: cement, sand, powdered waste in the form of utilized optical discs and water.Based on the results of testing the samples, mathematical models have been developed which describe the dependences of the physical and mechanical properties of the cement com-posite material samples on the fraction of waste and water-cement ratio. It was found that with an increase in the amount of powdered waste added into the mixture, it reduces the compressive strength, bending strength, and density of the samples under study, however, the optimization of the water-cement ratio makes it possible to obtain equal strength compositions with a differ-ent fraction of waste.Component compositions of cement composite material mixtures with the addition of powdered utilized optical discs in the amount of 10 to 25 % of the total filler mass, which can provide construction products with a compressive strength class B20, are presented.

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Research on Simulation Test of Coal Similar Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.850-851.847 ◽

2013 ◽

Vol 850-851 ◽

pp. 847-850 ◽

Cited By ~ 2

Author(s):

Lin Chao Dai

Keyword(s):

Compressive Strength ◽

Raw Materials ◽

Similarity Theory ◽

Design Method ◽

Uniform Design ◽

Physical And Mechanical Properties ◽

Raw Material ◽

Similar Material ◽

Cement Ratio ◽

Water Cement Ratio

In order to study the coal and gas outburst similar simulation experiment, coal similar material was made up based on the similarity theory. Based on the previous similar material study, the cement, sand, water, activated carbon and coal powder was selected as the raw material of similar material. Meanwhile similar material matching program with 5 factors and 6 levels was designed by using Uniform Design Method. And the physical and mechanical properties of the similar material compressive strength was measured under different proportions circumstances. The relationship between similar material and the raw materials was analyzed. The results show that choosing different materials can compound different similar materials with different requirements. And the water-cement ratio plays a decisive influence on the compressive strength of similar material. The compressive strength of similar material decreases linearly when the water-cement ratio increases.

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Mechanical Properties of Concrete with Various Water-Cement Ratio After High Temperature Exposure

Jurnal Teknik Sipil ◽

10.28932/jts.v2i2.1262 ◽

2019 ◽

Vol 2 (2) ◽

pp. 126-136

Author(s):

M.I Retno Susilorini ◽

Budi Eko Afrianto ◽

Ary Suryo Wibowo

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

High Temperature ◽

Modulus Of Elasticity ◽

Building Materials ◽

Heating Process ◽

High Temperature Exposure ◽

Cement Ratio ◽

Water Cement Ratio ◽

Temperature Exposure

Concrete building safety of fire is better than other building materials such as wood, plastic, and steel,because it is incombustible and emitting no toxic fumes during high temperature exposure. However,the deterioration of concrete because of high temperature exposure will reduce the concrete strength.Mechanical properties such as compressive strength and modulus of elasticity are absolutely corruptedduring and after the heating process. This paper aims to investigate mechanical properties of concrete(especially compressive strength and modulus of elasticity) with various water-cement ratio afterconcrete suffered by high temperature exposure of 500oC.This research conducted experimental method and analytical method. The experimental methodproduced concrete specimens with specifications: (1) specimen’s dimension is 150 mm x 300 mmconcrete cylinder; (2) compressive strength design, f’c = 22.5 MPa; (3) water-cement ratio variation =0.4, 0.5, and 0.6. All specimens are cured in water for 28 days. Some specimens were heated for 1hour with high temperature of 500oC in huge furnace, and the others that become specimen-controlwere unheated. All specimens, heated and unheated, were evaluated by compressive test.Experimental data was analyzed to get compressive strength and modulus of elasticity values. Theanalytical method aims to calculate modulus of elasticity of concrete from some codes and to verifythe experimental results. The modulus elasticity of concrete is calculated by 3 expressions: (1) SNI03-2847-1992 (which is the same as ACI 318-99 section 8.5.1), (2) ACI 318-95 section 8.5.1, and (3)CEB-FIP Model Code 1990 Section 2.1.4.2.The experimental and analytical results found that: (1) The unheated specimens with water-cementratio of 0.4 have the greatest value of compressive strength, while the unheated specimens with watercementratio of 0.5 gets the greatest value of modulus of elasticity. The greatest value of compressivestrength of heated specimens provided by specimens with water-cement ratio of 0.5, while the heatedspecimens with water-cement ratio of 0.4 gets the greatest value of modulus of elasticity, (2) Allheated specimens lose their strength at high temperature of 500oC, (3) The analytical result shows thatmodulus of elasticity calculated by expression III has greater values compares to expression I and II,but there is only little difference value among those expressions, and (4)The variation of water-cementratio of 0.5 becomes the optimum value.

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Comparative Analysis of Engineering Properties of Indus River Sand Concrete with Quarry Dust Concrete, District Jamshoro Sindh Pakistan

10.36811/gjcee.2021.110009 ◽

2021 ◽

pp. 11-16

Author(s):

Mushtaque Ahmed Pathan ◽

Maryam Maira ◽

Arif Ali Khaskheli ◽

Agha Jamshed Ahmed

Keyword(s):

Compressive Strength ◽

Comparative Analysis ◽

Physical And Mechanical Properties ◽

High Strength ◽

Engineering Properties ◽

River Sand ◽

Cement Ratio ◽

Water Cement Ratio ◽

Structural Applications ◽

Quarry Dust

This study shows the comparative analysis engineering, the physical and mechanical properties of river sand concrete with quarry dust concrete. The selected materials were batched by weight and volume. The water-cement ratio opted as 0.50 1:2:4 for mix ratio was selected for the experimental investigation respectively. The specimens were cured for 7, 14, 21, and 28 days. For the purpose Slump, density, and compressive strength tests were carried out. The river sand concrete showed better results and greater density and compressive strength than quarry dust concrete for all curing ages. The 28 days of curing, river sand concrete rise the required compressive strength by 36%, whereas quarry dust concrete was less than the limit compressive strength by 12%. Both river sand concrete and quarry dust concrete for the selected water/cement ratio and mix ratio has been found suitable for non-structural applications and lightly-loaded members where high strength is not a prerequisite. Keywords: River Sand; Quarry Dust; Density; Compressive Strength; Concrete

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Study on Reuse of Wasted Diatomite from Brewing Industry for Building Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.845.73 ◽

2020 ◽

Vol 845 ◽

pp. 73-78

Author(s):

Yeng Fong Shih ◽

Wei Cheng Hou ◽

Venkata Krishna Kotharangannagari

Keyword(s):

Compressive Strength ◽

Organic Matter ◽

Thermogravimetric Analysis ◽

Building Materials ◽

Cement Mortar ◽

Brewing Industry ◽

Cement Ratio ◽

Water Cement Ratio ◽

The Cost ◽

Average Compressive Strength

In order to solve environmental problems and reduce the cost of building materials, this study used waste diatomite from brewing industry to develop novel cement mortar and compared it with pristine one. After pretreatment with water, soaking, drying, it is shown in the microscope that the treated diatomite has recovered its porosity. The thermogravimetric analysis also showed that the purity of treated diatomite was greater than 93%, confirming that most of the originally adsorbed organic matter was removed. Further, the diatomite after the treatment was used to prepare a novel cement mortar, and it was found that the optimum compressive strength was obtained when the water-cement ratio was 0.65 and the amount of diatomite added was 20%. It was found that the average compressive strength after 28 days was 284.03 kg/cm2, which was 81.22 kg/cm2 higher than that of the pristine cement mortar. It is proved that the addition of diatomite can increase the strength of the cement mortar and effectively reuse the waste diatomite.

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Effects of Quarry Dust as Partial Sand Replacement on Compressive Strength and Crack Profile of Cement Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.819.399 ◽

2015 ◽

Vol 819 ◽

pp. 399-404

Author(s):

M. Madzura ◽

M.N. Mazlee ◽

Shamsul Baharin Jamaludin

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Cement Composite ◽

Cement Composites ◽

Cement Ratio ◽

Water Cement Ratio ◽

Strength Tests ◽

Experimental Works ◽

Quarry Dust ◽

Crack Profile

This research presents the findings of experimental works in terms of mechanical properties and crack profile of cement composites containing quarry dust at different percentages as a partial sand replacement. The compositions of quarry dust were varied from 10 to 20 wt. % and were mixed into five different ratios. It was found that 0.45 water cement ratio was suitable to mix all proportions and values of slump were observed have been increased with the increasing percentage of quarry dust in cement composites. The compressive strength tests were carried out and the results showed that the compressive strength decreased at each 2.5 percent interval of quarry dust at 7 and 28 days of curing. However, the strength developments of cement composites were increased corresponding to the ages of curing. The crack profiles of cement composites have been analyzed to investigate the strength developments of the cement composites. According to the results, the cracks in the specimens were in shearing pattern at 10 and 12.5 wt. % of quarry dust in cement composites. Meanwhile, as the contents of quarry dust at 15, 17.5 and 20 wt. %, the specimens failed in shearing and splitting patterns. According to the findings of compressive strength and crack profile, the contents of quarry dust as a partial sand replacement is 12.5 wt. % were more suitable to be utilized in cement composite

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INCREASING IN IMPACT VISCOSITY OF FIBER-ASH-CONCRETE

Construction Materials and Products ◽

10.34031/2618-7183-2020-3-6-5-16 ◽

2021 ◽

Vol 3 (6) ◽

pp. 5-16

Author(s):

R. Fedyuk ◽

Yu. Liseycev ◽

A. Taskin ◽

R. Timohin ◽

Sergey Klyuev ◽

...

Keyword(s):

Compressive Strength ◽

Building Materials ◽

Bending Strength ◽

Materials Science ◽

Basalt Fiber ◽

Dynamic Strength ◽

High Strength ◽

Cement Composite ◽

Fiber Reinforced Concrete ◽

The Impact

The trend in building materials science is to replace the different proportions of Portland cement in the binder. Therefore, the paper proposes the principles of controlling the static and dynamic strength of fiber-reinforced concrete, consisting in the complex effect of the hydro-removed ash and slag mix and basalt fiber on the processes of structure formation of the cement composite. A four-stage purification system for the hydro-removed ash and slag mixture has been developed, including disintegration, flotation and two-stage magnetic separation. It was found that the density of the fresh mix from the dose behaves naturally, and the density of solid samples at low doses slightly decreases. High early strength of the developed composites is noted, in particular, for specimens with ASM, one and a half increase in compressive strength is traced in comparison with non-additive specimens. Combinations of "fiber + ASM" with a quadrupling of strength have a significant effect on bending strength. Successful approximations of the compressive strength and bending strength on the ASM dose for different ages (1, 7, 28 days) are traced with the regular behavior of the coefficients in the power dependences. Revealed a multiple increase in the impact strength of the developed compositions. The use of the results will lead to the possibility of designing high-strength concretes, including for special structures.

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Inhibition of Cracks on the Surface of Cement Mortar Using Estabragh Fibers

Advances in Materials Science and Engineering ◽

10.1155/2013/656109 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 5

Author(s):

Tahereh Soleimani ◽

Ali Akbar Merati ◽

Masoud Latifi ◽

Ali Akbar Ramezanianpor

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Bending Strength ◽

Cement Mortar ◽

Physical And Mechanical Properties ◽

Cement Composite ◽

Cement Composites ◽

Surface Cracks ◽

Reinforced Cement ◽

Mortar Matrix

The influence of adding Estabragh fibers into the cement composites of mortar on surface cracks and mechanical properties of mortar has been studied at various fiber proportions of 0.25%, 0.5%, and 0.75%. The mortar shrinkage was evaluated by counting the number of cracks and measuring the width of cracks on the surface of mortar specimens. Although the Estabragh fibers loss their strength in an alkali environment of cement composites, the ability of Estabragh fibers to bridge on the microcracks in the mortar matrix causes a decrease in the number of cracks and in their width on the surface of the mortar samples in comparison with the plain mortar. However, considering the mechanical properties of specimens such as bending strength and compressive strength, among all fiber proportions, only the specimens with 0.25% of Estabragh fiber performed better in all respects compared to the physical and mechanical properties of reinforced cement composite of mortar. Consequently, by adding 0.25% of Estabragh fibers to the cement mortar, a remarkable inhibition in crack generation on fiber-containing cement composite of mortar is achieved.

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Comparison of physical and mechanical properties of river sand concrete with quarry dust concrete

Selected Scientific Papers - Journal of Civil Engineering ◽

10.1515/sspjce-2018-0012 ◽

2018 ◽

Vol 13 (s1) ◽

pp. 127-134

Author(s):

Hyginus E. Opara ◽

Uchechi G. Eziefula ◽

Bennett I. Eziefula

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Physical And Mechanical Properties ◽

High Strength ◽

River Sand ◽

Cement Ratio ◽

Water Cement Ratio ◽

Structural Applications ◽

Strength Tests ◽

Quarry Dust

Abstract This study compared the physical and mechanical properties of river sand concrete with quarry dust concrete. The constituent materials were batched by weight. The water-cement ratio and mix ratio selected for the experimental investigation were 0.55 and 1:2:4, respectively. The specimens were cured for 7, 14, 21 and 28 days. Slump, density and compressive strength tests were carried out. The results showed that river sand concrete had greater density and compressive strength than quarry dust concrete for all curing ages. At 28 days of curing, river sand concrete exceeded the target compressive strength by 36%, whereas quarry dust concrete was less than the target compressive strength by 12%. Both river sand concrete and quarry dust concrete for the selected water/cement ratio and mix ratio are suitable for non-structural applications and lightly-loaded members where high strength is not a prerequisite.

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Use of Nondestructive Testing of Ultrasound and Artificial Neural Networks to Estimate Compressive Strength of Concrete

Buildings ◽

10.3390/buildings11020044 ◽

2021 ◽

Vol 11 (2) ◽

pp. 44

Author(s):

Fernando A. N. Silva ◽

João M. P. Q. Delgado ◽

Rosely S. Cavalcanti ◽

António C. Azevedo ◽

Ana S. Guimarães ◽

...

Keyword(s):

Neural Networks ◽

Compressive Strength ◽

Artificial Neural Networks ◽

Cross Sections ◽

Influential Factors ◽

Average Error ◽

Ann Model ◽

Cement Ratio ◽

Water Cement Ratio ◽

Artificial Neural

The work presents the results of an experimental campaign carried out on concrete elements in order to investigate the potential of using artificial neural networks (ANNs) to estimate the compressive strength based on relevant parameters, such as the water–cement ratio, aggregate–cement ratio, age of testing, and percentage cement/metakaolin ratios (5% and 10%). We prepared 162 cylindrical concrete specimens with dimensions of 10 cm in diameter and 20 cm in height and 27 prismatic specimens with cross sections measuring 25 and 50 cm in length, with 9 different concrete mixture proportions. A longitudinal transducer with a frequency of 54 kHz was used to measure the ultrasonic velocities. An ANN model was developed, different ANN configurations were tested and compared to identify the best ANN model. Using this model, it was possible to assess the contribution of each input variable to the compressive strength of the tested concretes. The results indicate an excellent performance of the ANN model developed to predict compressive strength from the input parameters studied, with an average error less than 5%. Together, the water–cement ratio and the percentage of metakaolin were shown to be the most influential factors for the compressive strength value predicted by the developed ANN model.

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