scholarly journals Flexural Strength and Toughness Behaviour of Polymer Concrete with Partial Replacement of Fine Aggregate by M-Sand

2019 ◽  
Vol 8 (12S) ◽  
pp. 1101-1103
Keyword(s):  
Flexural Strength ◽  
Partial Replacement ◽  
Polymer Concrete ◽  
Fine Aggregate ◽  
High Quality ◽  
The World ◽  
The Common ◽  
The Ideal ◽  
Strength And Toughness

The development segment for a structure solid assumes a significant job everywhere throughout the world the solid ought to have high compressive and flexural quality. Presently a day accessibility of regular assets is diminished due to the ecological issues are government limited sand quarries are supremacist in shortage and expands cost. So we need to move for the fake fine total in this paper rather than stream sand to assembling sand in incomplete supplant with SBR (polymer) in high quality on concrete different cement blends were assessed for compressive quality and Flexural quality. The common stream sand was mostly supplanted with m-sand by 0%, 25%, half and included the different rates of SBR latex (0,3,6,9,12) was likewise improving the usefulness concrete. The outcome shows that the there is a step by step expanded in the compressive quality and Flexural quality for this situation half substitution of m-sand and furthermore included the level of SBR increment the functionality However, further increases of m-sand caused a decrease in the quality. The ideal rate substitution of normal sand of m-sand is half and upgraded substance of polymer 9 % is gotten. Diagrams were drawn and results contrasted and controlled blend.

scholarly journals Partial replacement of fine aggregate with Copper slag and marble dust powder in geo-polymer concrete: A review

2021 ◽  
Vol 889 (1) ◽  
pp. 012070
Author(s):  
Amrinder Singh ◽  
Shalika Mehta
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Copper Slag ◽  
Maximum Strength ◽  
Partial Replacement ◽  
Polymer Concrete ◽  
Fine Aggregate ◽  
Split Tensile Strength ◽  
Marble Dust

Abstract -As of late the ascent of substantial creation costs has consistently been a worry of substantial makers and customers. Using current waste to override concrete and some poIn ongoing years the ascent of substantial creation costs has consistently been a worry of substantial makers and buyers. Using present day waste to override concrete and some bit of all out can diminish its cost and environmental dirt of all out can decrease its cost and natural tainting. The mark to the purpose of this paper to audit the shot at powder made from marble dust close by the copper slag as an in part substitution to fine aggregate all out in geo-polymer concrete. Marble dust powder was used in mix in comprise copper slag as in part substitution to fine aggregate in level of 10%, 20%, 30%, 40% and 50%. The strength of geo-polymer concrete was tested after 7 & 28 days. Result shows that compressive strength is increased after the replacement of 60% of copper slag and marble dust powder to fine aggregate and also flexural strength and split tensile strength increases strength upto 60% and 80% after replacement. These discoveries of the examination express that powdered marble dust will be utilized as the conceivable substitution material to fine aggregate to give maximum strength copper slag geo-polymer concrete.

INTRODUCTION TO THE NEW SERIES: UNCOMMON “COMMON SENSE”

2007 ◽  
Vol 4 (1) ◽  
pp. 45-49
Author(s):  
Akinobu Kuroda
Keyword(s):  
East Asia ◽  
Opposite Direction ◽  
Common Sense ◽  
High Quality ◽  
Short Supply ◽  
Modern Times ◽  
The Past ◽  
The People ◽  
The World ◽  
The Common

The common sense of modern times was not always “common” in the past. For example, if it is true that inflation is caused by an oversupply of money, a short supply of money must cause deflation. However logical that sounds, though, it has not been so uncommon in history that rising prices were recognized as being caused by a scarcity of currency. Even in the same period, a common idea prevailing in one historical area was not always common in another; rather, it sometimes appeared in quite the opposite direction. It is likely that the idea that a government gains from bad currencies, while traders appreciate good ones, is popular throughout the world. In the case of China, however, its dynasties sometimes intentionally issued high-quality coins without regard to their losses. East Asia shared the idea that cheap currency harms the state, while an expensive currency harms the people. This is in considerable contrast with a common image in other regions that authorities gained profits from seigniorage.

scholarly journals Effect of basalt powder addition on properties of mortar

2019 ◽  
Vol 262 ◽  
pp. 06002 ◽  
Author(s):  
Magdalena Dobiszewska ◽  
Waldemar Pichór ◽  
Paulina Szołdra
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Beneficial Effect ◽  
Cement Paste ◽  
Cement Hydration ◽  
Asphalt Mixture ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Freeze Resistance ◽  
Powder Addition

The study evaluates the use of waste basalt powder as a replacement of cement to enhance hydration of cement and mortar properties. The basalt powder is a waste resulting from preparation of aggregate used in asphalt mixture production. Previous studies have shown that analysed waste used as a fine aggregate replacement has a beneficial effect on some properties of mortar and concrete, i.e. compressive strength, flexural strength and freeze resistance. The present study shows the results of the research concerning the modification of cement paste and mortar with basalt powder. The modification consists in adding the powder waste as a partial replacement of cement. The percentages of basalt powder in this research are 0-40% and 0-20% by mass of cement in the pastes and mortars respectively. The experiments were carried out to determine the influence of basalt powder on cement hydration, as well as compressive and flexural strength. Results indicate that addition of basalt powder as a replacement of cement leads to deterioration of compressive strength. The flexural strength of mortar is improved in some cases. Waste basalt powder only slightly influences the cement hydration.

scholarly journals Problemele combaterii dăunătorilor la culturile agricole în spații protejate

2020 ◽  
Author(s):  
Andrei Lungu ◽  
Keyword(s):  
Climate Change ◽  
Powdery Mildew ◽  
Aphis Gossypii ◽  
Climatic Conditions ◽  
Thrips Tabaci ◽  
High Quality ◽  
The Earth ◽  
The World ◽  
The Common ◽  
Lecanicillium Longisporum

Climate change is becoming increasingly unpredictable as the climate dries up, protected areas grown with vegetables are growing every day, but farmers in this area are facing a number of problems, including pests of green cucumber lice (Aphis gossypii), the common thrips. (Thrips tabaci), the common red spider (Tetranychus urticae). Scientists around the world are conducting studies to propose solutions. The use of material that allows the passage of a larger amount of UV rays inhibits the development of aphid colonies. The dual application of Lecanicillium longisporum for the simultaneous suppression of green lice of cucumbers and powdery mildew has been demonstrated. Beauveria bassiana preparations are highly effective against tripe. For a future assured with high quality vegetables, it is necessary to develop as diverse methods as possible to control pests, so that each farmer can choose the method that suits him, both technologically and economically. The methods should be applicable in the most diverse areas of the earth. We must learn to model not only favorable climatic conditions but to create a healthy and viable ecosystem, so the greenhouses will generate profit for the farmer, fresh and tasty products for us.

MECHANICAL PERFORMANCE OF ROLLER COMPACTED RUBBERCRETE WITH DIFFERENT MINERAL FILLER

2017 ◽  
Vol 79 (6) ◽  
Author(s):  
Musa Adamu ◽  
Bashar S. Mohammed ◽  
Nasir Shafiq
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Silica Fume ◽  
Mechanical Performance ◽  
Fine Sand ◽  
Crumb Rubber ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Mineral Filler ◽  
Scrap Tires

The rate of waste tire generation globally continues to escalate due to increase in vehicle usage. Scrap tires continue to pose serious environmental, health and aesthetic problems. Due limitation in the recycling of scrap tires, one of the most viable solution is to used crumb rubber from scrap tire as partial replacement to fine aggregate in concrete industry. This is rationalized as the production of concrete hit more than 3.8 billion cubic meters annually, therefore, it could provide a solution on conservation of natural aggregate and as well as improve properties of concrete. However, the major setback in the use of crumb rubber in concrete is loss in strength.  In this paper, crumb rubber was used to partially replaced fine aggregate at 0%, 10%, 20% and 30% by volume in roller compacted concrete for pavement applications to produce roller compacted rubbercrete (RCR) to improve its flexural strength and ductility. Several trials were done to achieve the combined grading as recommended by ACI 211.3R, and finally a combination of 55% fine aggregate, 40% coarse aggregate and 5% fine sand as mineral filler was used. In order to mitigate the effect of strength loss, silica fume and fly ash were used to replace natural fine sand as mineral fillers. The Results showed that fresh density, compressive, splitting and flexural strengths decreases with increase in partial replacement of fine aggregate with crumb rubber. However using silica fume as a mineral filler was successful in mitigating loss in compressive, tensile and flexural strengths for up to 20% crumb rubber replacement level, while fly ash as a mineral filler mitigated loss in strength for up to 10% crumb rubber compared natural fine sand mineral filler. The flexural strength was found to increase with 10% crumb rubber for all type of mineral filler

Towards a morally defensible concept of toleration: Insights from ancient Chinese thinking

2019 ◽  
Vol 45 (4) ◽  
pp. 461-468
Author(s):  
Pei Wang
Keyword(s):  
Cultural Diversity ◽  
Common Sense ◽  
Modern Society ◽  
Moral Emotions ◽  
Ancient China ◽  
Political Unity ◽  
The World ◽  
The Common ◽  
The Ideal

The diversification of the world has given us the opportunity to live with different people. This kind of diversification brings not only adventure and excitements but also interaction with people and their habits that we do not agree with. In response, toleration has become the common sense of people in modern society. However, what is the meaning of the word toleration? What moral emotions underlie the practice of toleration? This article puts forward a morally defensible concept of toleration inspired by ancient Chinese thinking. I first discuss the etymology of the word toleration from Anglophone and Chinese perspectives, and then analyse three problematical emotional attitudes towards others (disgust, indifference and hunting for novelty) and critique the spirit of exclusion in the dominant Anglophone understanding of toleration. Finally, I analyse a morally defensible concept of toleration based on the ‘the dao of zhong and shu’ (忠恕之道) that also served as the ideal underpinning political unity and appreciation for cultural diversity in ancient China.

Physical Properties of Polyester Polymer Concrete Composite Using RCSS Fine Aggregate

2013 ◽  
Vol 687 ◽  
pp. 219-228
Author(s):  
Eui Hwan Hwang ◽  
Jin Man Kim ◽  
Sun Gyu Park
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Water Resistance ◽  
Strength Test ◽  
Polymer Binder ◽  
Hot Water ◽  
Resistance Test ◽  
Polymer Concrete ◽  
Fine Aggregate

For the recycling of rapid-cooled steel slag (RCSS), various specimens were prepared with the different replacement ratios of RCSS and the addition ratios of polymer binder. The physical properties of these specimens were then investigated by compressive strength test, flexural strength test, water absorption test, hot water resistance test, measurement of pore distribution and observation of micro-structures using scanning electron microscope(SEM). Results showed that compressive and flexural strength increased with the addition ratios of polymer binder and replacement ratios of RCSS, but those strengths decreased reversely when addition ratio of polymer binder and replacement ratio of RCSS were excessively high. By the hot water resistance test, the compressive strength and flexural strength decreased remarkably and total pore volume increased but bulk density decreased. SEM observation of structure before hot water resistance test revealed very compact infusion of structure but decomposition or thermal degradation appeared in polymer binder when observed after the hot water resistance test.

scholarly journals Experimental Study on Strength of Concrete Partially Replacing Chiton shell as Fine Aggregate

2018 ◽  
Vol 7 (3.34) ◽  
pp. 406
Author(s):  
J Madhan Kumar ◽  
R Kalaiselvan ◽  
Raghul Raj
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Natural Resources ◽  
Coarse Aggregate ◽  
Marine Organism ◽  
Raw Material ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Split Tensile Strength ◽  
The World

The most widely used material in the world is concrete, consequently there is a large requirement for raw material of concrete such as Fine Aggregate, Coarse Aggregate and cement. the huge extraction of the aggregate for manufacturing of concrete as serious effect on the environment due to depletion of natural resources and pollution. This affects the eco system to great extent. Hence the project deals with finding replacement for the existing raw material used in concrete by replacing the fine aggregate from river which is largely used in construction by chiton shell. Sea shell is the corpus of the marine organism. The sea shell has been grinded to 4.75mm and then replaced in the concrete. M20 mix was used and cubic specimen were casted for 5 different percentage of partial replacement as 0%, 5%, 10 %, 20%, and 25 %. All the specimens are tested for 7 & 28 days compressive, flexural and split tensile strength. it has been noted that the highest strength is obtained for 25% replacement of chiton shell. it was also observed that  addition of sea shell power in concrete reduced workability hence superplasticizer were added to improve the consistency. 

Partial Replacement of Fine Aggregate by Using Bottom Ash & Manufacturing Sand with Addition of Silica Fume in Concrete

2021 ◽  
Vol 9 (10) ◽  
pp. 1649-1663
Author(s):  
M. Sriram
Keyword(s):  
Silica Fume ◽  
Bottom Ash ◽  
Strength Test ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Tensile Strength Test ◽  
Concrete Properties ◽  
Fine Aggregates ◽  
The World ◽  
Strength And Durability

Abstract: Sand is the major material used in construction all over the world. Nowadays sand is highly demand for the construction. The main purpose of this project is to investigate the effect of bottom ash in concrete and hence improving the strength and durability of concrete. So the objectives of this study were to investigate the effect of use of coal bottom ash & msand as partial replacement of fine aggregates. Percentages {M-Sand (50%), bottom ash (5%, 10% , 15% , 20%) , silica fume(2% were added) for 25% of bottom ash}. on concrete properties such as compressive strength, splitting tensile strength test. The results of specimens with and without bottom ash, Manufacturing sand, silica fume were compared. The strength of concrete was increased upto 15% replacement of bottom ash instead of fine aggregate and the 25% replacement of bottom ash with 2% of silica fume increased the strength of concrete. Keywords: Bottom ash, silica fume, manufacturing sand

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