Strategies for Effective Implementation of the CPAR Program - Building Up From the Gains: Lessons From the Improvements for Effective Implementation of the Community-Based Participatory Action Research Program (SEARCA-DA-BAR Policy Brief 2021)
Skills Needs Anticipation (SNA): Workplace Skills and Satisfaction (WSS) Baseline Survey of Select Employers in the Construction Industry
Strengthening Multi-employer Bargaining: Policies and Practices (Phase II)
Non-Hazardous Activities for Children: The Case of Banana and Sugarcane Supply Chains

PIDS WB 2021-0905
7th Mindanao Policy Research Forum
PIDS WB 2021-0905
Annual Public Policy Conference Webinar 4: Robust and Healthy Workforce and Closing Program
PIDS WB 2021-0904
Annual Public Policy Conference Webinar 3: Green And Inclusive Recovery
PIDS WB 2021-0903
Annual Public Policy Conference Webinar 2: Ethical Business
Publication Detail
RP NCTS 1996-02: Experimental Investigation on Lahar as an Alternative Material for Road Subbase Courses

After six centuries of inactivity, Mt. Pinatubo in Zambales has erupted in June 1991, spewing million cubic meters of lahar and burying the nearby towns of Pampanga, Tarlac and Zambales. Numerous researches have already been conducted utilizing lahar as an alternative construction material, focusing on industrial purposes. This study focuses on lahar as an alternative pavement material, specifically as a subbase course material. To determine the suitability of lahar as a subbase course material, various laboratory tests were performed on lahar samples collected from Porac, Pampanga. Considering the physical properties and chemical and mineralogical composition, a suitable stabilizer or treating agent for lahar was chosen. Stabilization of lahar consisted of mixing lahar with varying percentages of Portland cement, emulsified asphalt and moisture contents. Results showed that although lahar passed the 25% CBR requirement set by the Department of Public Works and Highways for road subbase courses, it cannot be recommended as an alternative subbase material because of its tendency to deform with the application of high loads. However, lahar stabilized with 2% Portland cement and 5% emulsified asphalt can be one option for road subbase courses, with a CBR value of 84.91%. This mix was observed to be much stronger and more stable than raw lahar.

UP-National Center for Transportation Studies
Authors Keywords
Jarbadan, Ma. Jocelyn A.; infrastructure; road traffic; infrastructure development;
Download PDF Number of Downloads
Published in 1996 and available in the NCTS Library or NO PDF AVAILABLE Downloaded 0 times since November 25, 2011
Please let us know your reason for downloading this publication. May we also ask you to provide additional information that will help us serve you better? Rest assured that your answers will not be shared with any outside parties. It will take you only two minutes to complete the survey. Thank you.

To use as reference:
If others, (Please specify):
Name: (optional)
Email: (required, but will not display)
If Prefer to self-describe, please specify:
Level of Education:
If employed either part-time or full-time, name of office:
If others, (Please specify):
Would you like to receive the SERP-P UPDATES e-newsletter? Yes No
Use the space below if you have any comment about this publication or SERP-P knowledge resources in general.