Journal of Construction and Building Materials Engineering https://matjournals.net/engineering/index.php/JOCBME en-US Journal of Construction and Building Materials Engineering An Indigenous 3D Layered Printing Technology for Low Cost Housing https://matjournals.net/engineering/index.php/JOCBME/article/view/934 <p><em>In the last four decades, there has been a decrease in natural building material resources, viz. wood, timber, bamboo, and roofing material. Due to the infrequent availability of the above material, house-builders’ occupations are becoming more and more difficult. Due to the contrast between rainfall-runoff on farms and villages, people prefer to come to metros for jobs, where they require economic shelter. Hence, we have to apply the recent and fast techniques to build homes for low-income families; it will create a socio-economic impact on the country and make India self-reliant. Here is an attempt to present an indigenous idea of applying 3D printing technology for low-cost housing for low-income families of India who reside in slum areas in metros and villages. The 3D printing technology is used at the Indian Institute of Technology, Chennai, to build a home and at Bangalore to build a post office, which is a very economical and speedy construction.</em></p> Swajayee A. Dahake Manisha G. Waje Copyright (c) 2024 Journal of Construction and Building Materials Engineering 2024-09-13 2024-09-13 1 10 Utilizing Demolished Waste and GGBS in Cement Concrete https://matjournals.net/engineering/index.php/JOCBME/article/view/946 <p><em>In the current era of rapid development and innovation, the generation of waste materials is on the rise while natural resources are depleting. This situation necessitates the reuse of waste materials. In the construction industry, waste materials from dismantled buildings can be repurposed for small construction projects and roadworks. This study uses demolished aggregate, ggbs, and admixtures in various combinations. Demolished aggregate, a pure waste material, replaced natural coarse aggregate in proportions of 0%, 5%, 10%, 15%, 20% and 25%.</em></p> <p><em>Additionally, cement was partially replaced with ggbs at 0%, 5%, 10%, 15%, 20%, and 25%, along with a water-reducing admixture of up to 2% by weight of cement. Various tests were conducted, including the specific gravity of coarse and fine aggregates, water absorption, impact value, slump cone, particle size distribution, and Los Angeles abrasion tests. Concrete cubes were cast using an M30 mix design and tested for compressive strength at 7 and 28 days and flexural strength at 28 days. The characteristic strength of the recycled concrete was compared with that of conventional concrete. </em></p> Rahul Malviya Shivam Chaturvedi Copyright (c) 2024 Journal of Construction and Building Materials Engineering 2024-09-19 2024-09-19 11 23 Edifices Created with Precast and Prefabricated Components https://matjournals.net/engineering/index.php/JOCBME/article/view/948 <p><em>Typically, the precast and prestressed concrete courses encompass various topics vital for understanding and applying the principles of prestressed concrete design and construction. This paper is designed to educate students on precast and prestressed concrete's theory and practical aspects, emphasizing the importance of understanding the mechanics, design principles, and construction techniques involved. By the end of this paper, one will have a solid foundation in working with these materials and be prepared to apply their knowledge in real-world scenarios. Comprehending the basic principles of prestressing, encompassing a range of systems and techniques employed within the field, is crucial for professionals in the industry. By delving into the core concepts of prestressing, individuals can gain a deeper insight into how this method enhances the structural integrity of various construction projects. Understanding the different systems and strategies utilized in prestressing allows engineers and architects to make informed decisions when designing and implementing their projects.</em></p> Ghufran Ahmad Khan Copyright (c) 2024 Journal of Construction and Building Materials Engineering 2024-09-20 2024-09-20 24 36 Experimental Study on Comparative Analysis of Different Concrete Curing Methods with a Focus on Compressive Strength https://matjournals.net/engineering/index.php/JOCBME/article/view/1022 <p><em>For the sake of our planet's health, it is imperative that water resources are managed sustainably, and the building sector must contribute to reducing its water footprint. As this research indicates, this calls for a change toward wise water use and implementing different concrete curing methods. 36 concrete cylinders were prepared with a 1:2:3 mix ratio and divided into 4 groups of 9 cylinders. 4 groups of cylinders were cured using four different curing strategies for 7 days, 14 days, and 28 days. A compressive strength test was performed on these cylinders, and the results showed that curing by water pond attained the maximum compressive strength in the specimens, followed by curing by using a water-based curing compound, curing with waterproof plastic paper, and curing by water sprinkling. The test also revealed that the compressive strength of the specimens under any curing strategy increased with its curing period in the day. </em></p> <p><em>&nbsp;</em></p> Imtiaz Ibne Azad Mostakim Ahmed M. M. Fahad Islam Barno Copyright (c) 2024 Journal of Construction and Building Materials Engineering 2024-10-17 2024-10-17 37 52 Evaluation of Physical Properties of Aggregates: A Case Study on Aggregate Sources around Kathmandu Valley https://matjournals.net/engineering/index.php/JOCBME/article/view/1030 <p><em>Aggregates play a crucial role in construction works, and this research aims to characterize aggregates from different sources in the Kathmandu Valley, considering factors such as particle size, shape, water absorption, and toughness, resistance to abrasion, crushing value, and impact value. The study investigated identifying and testing aggregates from the sources around and within Kathmandu Valley. A preliminary survey identified nine quarries around Kathmandu Valley based on accessibility to the valley and the highest producers (regarding materials volume). Coarse aggregate samples were collected from Dukuchap (Lalitpur), kaldhunga (Kavre), Bogati Panauti (Kavre), Aagra Khola (Makwanpur) and Melamchi (Sindhupal Chowk. Fine aggregates were collected from Melamchi (Sindhupal Chowk), Belkhu (Dhading), and Sankhu (Kathmandu). Evaluation of physical properties of aggregates included fineness modulus test, water absorption test, crushing value test, Impact value test, silt content test, Flakiness and Elongation test, and abrasion resistance test. Upon meticulous evaluation of the collected samples, it was observed that Fineness Modulus, specific gravity, water absorption, materials finer than 75μm and silt content of the sources were found in between the respective range of (1.97 to3.49), (2.53 to2.62), (1.05 to1.96) % and (1.74 to 5)% and (1.21 to 11.04) respectively. Similarly, specific gravity, water absorption, flakiness index, abrasion value, impact value, and crushing value of coarse aggregates were found in the range of (2.65-2.72), (0.36-1.07)%,(15.03-18.41)%,(15.94-41.52)%,(15.23-34.31)% and(13.55-28.68)% respectively. </em></p> Aaradhya Kafle Abhishek Neupane Anmol Budhathoki Ashish Baniya Dipesh Adhikari Nimesh Koirala Srijan Subedi Chowi Sudeep Thapa Copyright (c) 2024 Journal of Construction and Building Materials Engineering 2024-10-19 2024-10-19 53 59