scholarly journals Trial Examination of Synthetic Polymer as Shear Reinforcement

Steel Plays major role in the field of construction industry. Due to Rapid industrialization and urbanization has increased to twofolds the demand and usage of materials. Increasing demand creates depletion of material. Excessive waste plastic creates Environmental pollution, in order to reduce the waste it can be converted into polymers and can be used in the field of construction industry. Waste material can be used to replace the steel material in concrete as an alternative source. Usage of synthetic material increases day by day due to its advantages. A study was carried out to understand the behavior of synthetic polymers to be used in different fields. The research work is carried out for different polymers. It is found from the results that Strength of synthetic polymers is more when compared with other polymers and can be used as reinforcement in concrete there by reducing the weight of concrete member. The application of using synthetic polymer in concrete is not only limited to the weight reduction but also it reduces the cost of construction. Cost of construction can be reduced in the following ways, First it does not need skilled labors, second reduces the corrosion risks. Synthetic polymer has higher tensile strength compared to conventional steel polymer, hence more investigation to be carried out to expose the potentiality of the material

2021 ◽  
Vol 9 (3) ◽  
pp. 56-60
Author(s):  
Irina Karakozova ◽  
Yuliya Prohorova

Currently, there is an active transition of the investment and construction industry in the field of digitalization in many management processes. The main focus of the state is focused on the continuous process of managing information modeling technologies of a construction object at all stages of its life cycle, and the key element of this management process is the collection and publication of analytical data collected automatically by extracting the requested information from information systems about stages and critical points in urban development. Of particular importance is the automation of the process of managing the cost of the object and the creation of a unified information environment that takes into account possible factors of cost changes during the implementation of the construction object.


Land value can be an important factor which influences the cost of construction on working in the project. The land has socio-economic and environmental values and the confronted problems on land involves the increasing costs for developing the land such as built up, agricultural, residential, commercial and industrial areas. Hence this paper concentrates on prediction of land value by considering some important factors that affects it. The study area has been selected under Tirupur district, being a developing one in Tamil Nadu. The eleven areas in four different taluks under Tirupur district were chosen for research work. The average values of monthly variation are taken for the chosen factor for the years from 2001 to 2017. Using regression analysis and artificial neural network, the prediction has been done for the future land value. The performance of both the model executed good and fit for forecasting results. Though both the model showed better results, Artificial Neural Network (ANN) showed accuracy than regression method.


Author(s):  
Sangavi D ◽  
Angu Senthil K

A Rise in urbanization and industrialization has led to over utilization of natural river sand, which affects environmental sustainability. Nowadays, due to the massive demand of river sand, M-sand has been replaced effectively and being used in the construction industry. Although M-Sand is desirably used, it can lead to more water and cement requirement to achieve the expected workability which in turn increases the cost of construction. Thus as an alternative solution, industrial by-product like waste foundry sand can be used. When sand can no-longer be reused in the foundry, it is known as waste foundry sand. As it is discarded in a landfill, it tends to pose several environmental impacts. In order to reduce the disposal problem, waste foundry sand is reused in engineering applications. In this paper, various strength and durability properties have been studied, and an overview of some of the research works on the utilization of waste foundry sand in concrete were given. Fine aggregate is replaced with different proportions of waste foundry sand (0-100%). From the results obtained, the optimum % replacement of foundry sand is found to be in the range of 20% to 40% based on the grade of concrete.


10.29007/vbwk ◽  
2020 ◽  
Author(s):  
Vajira Edirisinghe ◽  
Dianne Marsh ◽  
Fiona Borthwick ◽  
Alison Cotgrave

Disputes in construction projects affect not only delay in construction progress but also its cost and potentially its quality. The construction industry of Sri Lanka contributes significantly to its economy and the cost of construction disputes can influence its economic welfare. It is important to understand the significant disputes in the Sri Lankan construction industry in order to mitigate this cost. A qualitative descriptive study has been conducted through semi-structured questionnaires analyzed using a thematic approach. The sample comprised of 10-construction industry professionals all involved in the dispute resolution process. The literature identified 7 main dispute causes as being owner related, contractor related, project related, design related, contract related, human behavior related and consultant related. The interviews identified sub themes from each, which were then ranked in order to identify those that were most significant. It was found that many of the sub themes were inter related and that one cause could be the creation of another. The lack of appropriate communication between parties and lack of team spirit were identified as the genesis of disputes in the Sri Lankan construction industry. The next stage of this research is to identify the dispute resolution methods specific to Sri Lanka in order to develop a framework for cost optimization of dispute resolution methods that link specifically with the causes of dispute as identified in this study.


Author(s):  
Gomasa Ramesh ◽  

Geopolymer Concrete is a new innovative type of concrete, and it is used widely in the construction industries. This type of concrete comes into place due to reduced cement content usage in the construction of structures. Already we are using cement as a binding material widely in the construction sector, but the problem is due to the cement content Co2 emissions are mainly produced and one more problem is greenhouse gases are increasing rapidly during the manufacturing of cement. Then after a lot of researchers, finally we got a geopolymer as a replacement for cement. By replacing cement content with geopolymer, we can reduce the cost of construction and reuse the structural materials. So, this type of concrete is different from standard conventional concrete. We can minimize Co2 and greenhouse gases’ problem in the atmosphere and make the structure an environmentally friendly solution. So, this type of concrete is very famous in the construction industry, and there are benefits also excellent. So, it can be used widely in construction sectors worldwide. This paper may help understand Geopolymer Concrete for everyone quickly. It gives a quick review of the Geopolymer Concrete.


Now days the cost of construction is increasing day by day due to increase in the prices of the building materials. The main ingredients of the concrete are coarse aggregate, fine aggregate and cement. Every construction company mainly depends on these ingredients for the production of concrete. In the present scenario most of the research work is done on how to reduce the cost of construction by increasing the strength of the concrete. Depending up on the properties many of the waste materials are used in the concrete as the partial replacement of aggregates. Mostly fly ash ,rice husk ash and blast furnace slag are found to be suitable for replacing the fine aggregate partially in concrete. Agriculture is the major occupation of the people in India and coconut production is one of the major agriculture production in India. The shell of the coconut is an agricultural waste and requires large amount of area for its dumping after its usage. It causes environment pollution if it is not dumped properly and creates major problem. If this coconut shell is used as replacement for coarse aggregate in concrete it gives solution to the major environmental pollution. Experiments have done on the effect of partial replacement of coarse aggregate with coconut shell for different percentages and investigated the properties of this composite concrete In this study, for M20 and M25 grades concrete four different concrete mixes for each grade with various combinations of coconut shell of about 0%, 10%, 20% and 30% were prepared. For each concrete mix three sample specimens were casted. The main focus behind this study is to utilize the agricultural waste like coconut shells which are of low cost when compared to the coarse aggregates and thus giving rise to the topic of how to construct the structures within low cost. In this study a short term analysis, at 28 days, the nature of coconut shell aggregate concrete is studied by conducting some tests like compressive strength, workability tests and comparison of these results are made with the normal concrete. In order to maintain serviceability, durability and strength of the members all the necessary precautions are taken. Thus by adopting this concept it will be very much helpful for the civil engineers and especially the society to fulfill their basic needs like low cost housing.


Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1518 ◽  
Author(s):  
A. Perrot ◽  
Y. Jacquet ◽  
D. Rangeard ◽  
E. Courteille ◽  
M. Sonebi

Today, the extrusion-based 3D printing of concrete is a potential breakthrough technology for the construction industry. It is expected that 3D printing will reduce the cost of construction of civil engineering structures (removal of formwork) and lead to a significant reduction in time and improve working environment conditions. Following the use of this additive manufacturing layer-wise process, it is required to change the way concrete structures are designed and reinforced, especially for the parts of the structure under tension loads. Indeed, the extrusion-based concrete 3D printing process does not allow for the production of conventional reinforced concrete, and there is a need to develop other ways of compensating for the low mechanical performances of concrete, particularly in tension. In this study, the reinforcement of printed structures by using steel nails through the deposited layers of fresh concrete was investigated. Additionally, three-layer and 10-layer samples were reinforced with nails with varying inclination and spacing. The results show that inclined nails can be used to provide a flexural strengthening of the printing material in different directions.


2018 ◽  
Vol 212 ◽  
pp. 09005
Author(s):  
Tatiana Dobysheva ◽  
Ekaterina Gladkova

The problems of definition of the cost of design in construction are considered in the article. The existing regulatory documentation for determining the value of construction products on the territory of the Russian Federation is analyzed. A comparative analysis of the currently used methods for calculating the cost of designing is executed. The advantages and disadvantages of each method are considered, and the necessity of transformations in the sphere of determining the cost of design works is substantiated. The ways of increasing accuracy of calculation of the cost of design in construction are suggested, including the use of the territorial coefficient in calculations when utilizing the method of dependence on the natural indicators of the design objects. It is revealed that the use of this coefficient significantly increases the accuracy of calculations. For the method of calculating the cost of design as a percentage of the total cost of construction, it is proposed to clarify the methodology for calculating the cost of construction of multi-apartment buildings according to the enlarged construction price standards. It is proved that today it is impossible to replace the value of individual structural elements of an object in the event of differences in the design solutions with the solutions represented by similar objects in the collection of the construction price standards. The ways of solving these issues by the use of collections of standards for the price of construction solutions are outlined. The authors are convinced that the improvement of methods for calculating the cost of design products will improve the efficiency of investments in the construction industry.


2021 ◽  
Vol 1 (2) ◽  
pp. 5-8
Author(s):  
Gomasa Ramesh

Geopolymer Concrete is a new innovative type of concrete, and it is used widely in the construction industries. This type of concrete comes into place due to reduced cement content usage in the construction of structures. Already we are using cement as a binding material widely in the construction sector, but the problem is due to the cement content Co2 emissions are mainly produced and one more problem is greenhouse gases are increasing rapidly during the manufacturing of cement. Then after a lot of researchers, finally we got a geopolymer as a replacement for cement. By replacing cement content with geopolymer, we can reduce the cost of construction and reuse the structural materials. So, this type of concrete is different from standard conventional concrete. We can minimize Co2 and greenhouse gases’ problem in the atmosphere and make the structure an environmentally friendly solution. So, this type of concrete is very famous in the construction industry, and there are benefits also excellent. So, it can be used widely in construction sectors worldwide. This paper may help understand Geopolymer Concrete for everyone quickly. It gives a quick review of the Geopolymer Concrete.


Author(s):  
А.Н. Кондратьев

Оценен учет рисков при проектировании водопропускных сооружений на лесных дорогах на примере расчета русловых размывов берегов на малых водотоках. В результате расчетов гидрологических характеристик в современных нормативных документах по изысканиям получаются конкретные значения. Например, размыв берега в створе проектирования трубного перехода принимается равным 10 м. Неточности и ошибки расчетов при этом не учитываются, хотя они могут привести к тому, что проектируемое сооружение может быть размыто или, наоборот, заилено. Фактически же в расчетах всегда скрыты ошибки разного рода. Следовательно, имеется интервал разброса результатов расчета, например 8–12 м. Специфика инженерно-гидрометеорологических изысканий при подготовке данных для проектирования объектов лесной инфраструктуры заключается в том, что здесь более интересна верхняя граница, т. е. следует принимать размыв 12 м. Рассмотрено, как разброс результатов подобных расчетов может отразиться на затратах. Для этого оценен переход от значений размыва берега за период проектной эксплуатации сооружения и вероятности (P, %) к затратам (Z, руб.), а затем к риску (R, руб.), под которым понимается произведение затрат на обеспеченность R = ZP. Рассмотрен вклад разных затратных частей, из которых основные – на строительство и ликвидацию аварии. Выяснилось, что при разных соотношениях стоимости строительства и ликвидации аварии оптимальными будут разные стратегии: при малой стоимости выгодно уменьшать стоимость строительства, при большой стоимости ликвидации аварии лучше выбирать более безопасные варианты, даже при увеличении стоимости строительства. Estimated risks in the design of culverts on forest roads by the example of the calculation of channel erosion on the banks of small watercourses. The result of the calculation of hydrological characteristics in the modern normative documents on research work specific values. For example, erosion of the coast in alignment with the projecting pipe is 10 m. Inaccuracies and errors of calculation are not taken into account, although they can lead to the fact that the designed structure may be blurred, or vice versa, silted. In fact, the calculations are hidden all kinds of errors. Therefore, an interval of variation of the calculation result, for example, 8–12 m. Specificity of engineering-hydrometeorological survey in the preparation of data for the design of forest infrastructure is that in this case, a more interesting upper bound, that is, we should accept the erosion of 12 m. the article considers, as variation results of such calculations can affect the cost. For the evaluated transition from the values of Bank erosion during the period of project operation facilities and security (P, %), cost (Z, rub.), then risk (R, rub.), which is defined as the product of the cost of the security R = ZP. Contribution of different cost parts, which is main – 1) construction and 2) liquidation of the accident. It turned out that at different ratios of the cost of construction and the elimination of the accident will be optimized with different strategies: in low-cost liquidation of the accident is advantageous to reduce the cost of construction, with the high cost of liquidation of the accident it is better to choose more secure options, even if you increase the cost of construction.


Sign in / Sign up

Export Citation Format

Share Document