مشروع البحث: Frost Damage of Internally Insulated Retrofitted Solid Brick Walls: Experimental Work and Hygrothermal Modeling
تحميل...
المساهمين
الممولين
رقم التعريف
239
الباحث
Mohamed A.Z. Aldabibi
الوصف
presented interesting variations between their properties, probably due to the effects of the service
life for old brick types, where it has been manufactured and built for hundreds of years, the
manufacturing process for new bricks, and heterogeneity between samples in terms of pore size
distribution. Therefore, comprehending the influence of BP on the frost resistance (FR) of clay
bricks plays a fundamental role in controlling the FD phenomena and avoiding the deterioration of
the clay bricks, particularly after adding ITI. A good correlation was found between 5-h BWA,
C/B, A-value, and 24-h CWA. The Scrit is around 55%, 50%, 50, 65%, and 35% of ERP, ERU,
ENB, ENO, and IRM, respectively, ±5%. An empirical formula was developed to determine Scrit
based on 24-h CWA, 5-h BWA, and compressive strength. The modelling showed that depending
on the BP and moisture exposure level, adding ITI increases frost damage (FD) mainly in the
second layer (i.e., 15 mm inwards from the outer side) and the middle layer and adding ITI did not
impact walls made with samples having a Scrit of 0.60 or higher, even when subjected to higher
WDR. In contrast, clay bricks with a Scrit of 0.55 or less require additional attention, particularly
when exposed to higher WDR. Furthermore, depending on the 24-h CWA standard limit may
provide a good result for preventing FD after adding ITI; however, the 24-h CWA of a brick is not
an absolute indicator to predict FR. In addition, the insulation types and level do not impact FD for
the wall made with brick samples with a Scrit of 50% and higher. Although correlations in the BP
الكلمات الدالة
were found in the experimental and the modelling phases, a certain percentage of bricks are likely to fail, given the wide variation in properties.