TY  - BOOK
AU  - Calaranan,Gian Arman...et.al 
TI  - Investigation of coconut fiber(COIR) for stabilizing clay soil as road sub grade / 
PY  - 2021///
N1  - Thesis (BS Civil Eng) - Mariano Marcos State University; Bibliography:leaves 32-34
N2  -  						ABSTRACT CALARANAN, GIAN ARMAN 0,5 MARTINEZ KIM CHARLES A ZIPAGAN NEIL GARRET P.; CADIENTE, MARIFE F.; FLORES, RENCEL C. 2021. INVESTIGATION OF COCONUT FIBER (COIR) FOR STABILIZING CLAY SOIL AS ROAD SUBGRADE. Undergraduate Thesis. College of Engineering, Mariano Marcos State University, City of Batac 2906 llocos Norte. 41 pp. Adviser: Engr. Russell John F. Guinto  	This project study aimed the investigation of coconut fiber (coir) for stabilizing clay soil as road subgrade. The soil used in the study was selected from different samples gathered from three different locations. The soil is then subjected to Atterberg's Limit test to determine its degree of expansion. The soil taken at the location of soil sample from the MMSU Circular road was found to be the most expansive and was used throughout the study. The soil used has a Liquid Limit (LL) value of 81%, Plastic Limit (PL) value of 35.88%, and Plasticity Index (PD) value of 46.12% Coconut fiber (coir) was added with an increase ratio of 0.25% 0.50%, 0.75%, and 1.0% by weight of the soil for the quicklime. Proportions of coconut fiber (coir) were as follows: Sample 1 (0% coconut fiber): Sample 2 (0.25% coconut fiber): Sample 3 (0.50% coconut fiber): Sample 4 (0.75% coconut fiber); Sample 5 (1.00% coconut fiber). 	The Maximum Dry Density (MDD) increased from 1.51 g/ce for untreated soil to 1.61% g/ce when treated with 0.75% coconut fiber coir). The Optimum Moisture Content (OMC) decreased from 25.50% for untreated soil to 23.07% when treated with 0.75% Coconut fiber (coir). The CBR value for the untreated soil and the soil treated with 0.50% coconut fiber (coir) was increased from 4% to 6% but it didn't satisfy the AASHTO/DPWH specification requirement for the California Bearing Ratio (CBR) value to be used as a subgrade. Nevertheless, the researchers mainly recommended to future researches for coconut fiber (coir) to be used as soil fiber reinforcement to see its potential in geotechnical engineering, namely test the effect of the coconut coir in the shear strength of the fiber reinforced soil. Keywords: Coir, OMC, MDD, Soil Stabilization, Clay Soil
ER  -