https://elibrary.khec.edu.np/handle/123456789/98 2026-07-17T04:25:57Z 2026-07-17T04:25:57Z Koju, Surya Man https://elibrary.khec.edu.np/handle/123456789/151 2024-08-10T10:38:05Z 2017-04-01T00:00:00Z

Title: THERMAL BEHAVIOUR OF EXPANDED POLYSTYRENE BASED LIGHTWEIGHT CONCRETE SANDWICH PANEL AT VARIOUS TEMPERATURES Authors: Koju, Surya Man Abstract: Expanded Polystyrene (EPS) based lightweight concrete sandwich panel is a light weight building material that exhibits good thermal properties and is suitable for making thermally insulated building walls. This study contains experimental determination of thermal conductivity, overall heat transfer coefficient and thermal resistance of EPS based lightweight concrete sandwich panels. Resistive heating is used for performing thermal tests. Internal heat transfer is considered during experiment and the results are achieved by steady state heat transfer method. Thermal quality of sandwich panel with varying thicknesses is observed. Experiments are repeated with four types of source temperatures. All the samples are oven dried before taken into experimentation. The thermal results indicated that EPS based lightweight concrete sandwich panel poses overall heat transfer coefficient of 1.75 W/m2K, 2.06 W/m2K, 6.09 W/m2K and 6.54 W/m2K for 90 mm thick sandwich panel at low temperature, ambient temperature, high temperature and extreme temperature respectively.

2017-04-01T00:00:00Z Bala, Ramesh Gautam, Ghana Shyam Tamrakar, Gautam Bir Singh https://elibrary.khec.edu.np/handle/123456789/150 2024-08-10T10:38:04Z 2017-04-01T00:00:00Z

Title: ANALYSIS OF IRI VALUE FOR ASSESSMENT OF OPTIMUM MAINTENANCE STRATEGY FOR LOW TRAFFIC VOLUME ROADS IN NEPAL Authors: Bala, Ramesh; Gautam, Ghana Shyam; Tamrakar, Gautam Bir Singh Abstract: Road infrastructure is an important sector of economic activity for the development of a country. The road infrastructure is required to be maintained in proper condition to ensure its continuous utilization in proper manner. By proper maintenance of roads, continuous acceptability, a higher economy, safety and serviceability are gained. This research work was carried out through analysis of data collected from Department of Road (DoR) Nepal and surveyed through Google Earth. While analyzing data, data are categorized according to road type and pavement surface with spatial coverage. It mainly deals with the using of Road Economic Decision (RED) model, in which Highway Development and Management (HDM)-4 VOC model (Version 3.2) is used for computing coefficient of Vehicle Operating Cost (VOC) and RED Main Economic Decision model is used to compute value of International Roughness Index (IRI) for optimum maintenance strategy for strategic road network of Nepal with low traffic volume. The outcome of analysis will help the concern authority to make good decision on making priority and economical selection of maintenance strategy for the road having specified range of IRI value depending on the pavement type, surface type and volume of vehicle with spatial coverage.

2017-04-01T00:00:00Z Prajapati, Ratna Shova Shrestha, Rameshwor https://elibrary.khec.edu.np/handle/123456789/149 2024-08-10T10:38:03Z 2017-04-01T00:00:00Z

Title: ENGINEERING SOIL PROPERTIES OF BHAKTAPUR POTTERY Authors: Prajapati, Ratna Shova; Shrestha, Rameshwor Abstract: Pottery is one of the historic occupations of people of Bhaktapur. The tradition has been handed over to many successors, and the culture is still alive. Pottery in Bhaktapur municipality is concentrated in two parts namely; Suryamadi and Pottery-Square. The pottery work is adopted by ethnic group Prajapati, only they produce ceramic products in Bhaktapur municipality. Potters collect soil from specific location of Bhaktapur; Kamalbinayak, Nangakhel, Sipadol, and Tathali, which is suitable soil for ceramic manufacture. The soil samples from pottery site Suryamadi and Pottery-Square were collected. Grain size analysis, liquid limit and plasticity limit were tested. From the analysis, the soil sample from Pottery-Square was found to be finer than that from Suryamadi. Clay content and moisture holding capacity of the Suryamadi pottery work are greater than that of Pottery-Square pottery work. It shows that the Suryamadi pottery work had high tendency to get cracks and crumbled.

2017-04-01T00:00:00Z Shrestha, Ramila Karanjit, Sudip https://elibrary.khec.edu.np/handle/123456789/148 2024-08-10T10:38:02Z 2017-04-01T00:00:00Z

Title: Ambient vibration, fundamental time period, Fast Fourier Transform(FFT), geophone, RC building Authors: Shrestha, Ramila; Karanjit, Sudip Abstract: For the proper design of any structure, its fundamental properties should be known. The fundamental time period is a primary consideration for seismic design. Generally empirical relations given by code are used in design of building structure, where time period is the function of height and lateral dimension in most cases. But, these empirical relations given by codes are not verified in the context of Nepal. For existing structures, in addition to code formulas and available analytical tools, such as modal analyses, various methods of testing, including ambient and forced vibration testing procedures may be used to determine fundamental time period. In this study, the fundamental period of the 31 RC infill buildings located in Kathmandu valley was identified using ambient motions recorded at each building. Ambient vibration measurements of buildings have been performed by using geophone. Fundamental time periods evaluated experimentally and calculated by different codal formulas were compared. Single variable regression analysis was done, and time period in relation with height is evaluated. In this analysis, codal time period was found higher than experimental one. Multi-variable regression analysis was also done, and the relation between time period, height and lateral dimension was formulated. From multi variable regression formulation, it was concluded that the effect of base dimension of building to fundamental time period is very less. It can be concluded that the fundamental time period of RC building in our current practice can be better correlated by height only relation (T = CHa ) than by height and base-dimension relation (T = C ு √஽ ) given by code. Fundamental time period calculated from codal formula for RC building with infill and from experiment was found near in most cases.

2017-04-01T00:00:00Z