Structural analysis and restoration of Adobe stone walls in Nuestra senora de la annuciata parish churchl: Strengthening resilience and preserving historical heritage Daryl Owen S. Aloquin, Karen T. Fuentes, Ma. Gemina M. Llantero, Regine I. Mascariola, Mars Abigail R. Sergio

Bachelor's thesis

College of Engineering .-- Bachelor of Science of Civil Engineering: Technological University of the Philippines, 2024.

Includes bibliographic references and index.

The Nuestra Señora de la Annunciata Parish Church in Old Boso-Boso, Antipolo,
Rizal, is a historic adobe structure requiring significant restoration due to extensive damage
and weakened structural integrity. These issues pose a serious public safety risk,
particularly during earthquakes. This study investigates the chemical and material
properties of adobe, evaluates the structural performance of the church, and proposes
effective restoration techniques for adobe walls. The tests conducted include X-ray
fluorescence (XRF), X-ray diffraction (XRD), visual inspection, Rebound Hammer Test,
STAAD Pro analysis, Scanning Electron Microscopy (SEM), Hydraulic Conductivity Test,
and Compressive Strength Test. Restoration techniques such as montmorillonite clay and
limewash coatings for adobe blocks were tested and evaluated. Results show that adobe
blocks coated with these materials demonstrated significant improvements compared to the
control samples. Montmorillonite clay increased Young’s Modulus from 348,168 kN/m2
to 849,738 kN/m2 and Shear Modulus from 150,072 kN/m2 to 366,266 kN/m2. Limewash
yielded even better results, with Young’s Modulus reaching 874,701 kN/m2 and Shear
Modulus achieving 377,026 kN/m2. These interventions enhanced the stiffness and damage
resistance of the materials, demonstrating the effectiveness of montmorillonite clay and
limewash as restoration techniques for preserving historic adobe structures.