Abstract
The water leakage in an underground space cannot easily be repaired owing to the characteristics of the underground space, which not only causes continuous inconvenience to the apartment residents but also facilitates condensation. Thus, the effects of different waterproofing methods in underground spaces on changes in temperature and humidity should be quantitatively studied to establish strong measures for the condensation issue. In this study, two types of specimens were produced separately by dividing the waterproofing materials applied to underground structures into exterior and interior waterproofing construction methods; thereafter, changes in the temperature and humidity inside the specimens were observed. The test results of the evaluation regarding condensation in underground structures indicated that when exterior waterproofing materials are applied, thermal insulation maintains a steady interior temperature and keeps the humidity at an appropriate level, thereby preventing the creation of an environment conducive to the occurrence of condensation.
Highlights
Waterproofing technology to prevent water leakage underneath apartments is regarded as an important safety technology for construction quality that prevents safety-related accidents and protects national infrastructure and facilities [1]
In particular it was observed that the temperature change due to the winter season temperature testing of high-strength external waterproofing (HSC-O) and standard strength external waterproofing (OPC-O) had little change of approximately 0.5∘C over the period of 4 days and a large change of temperature of approximately 2.7∘C over the period of 8 days
(1) The measurement results of temperature and humidity changes in the interior of the specimens in winter indicated that the specimens with the exterior waterproofing applied (HSC-O, ordinary Portland cement (OPC)-O) maintained a higher temperature of approximately 1.13∘C, on average, than those of specimens with interior waterproofing applied (HSC-I, OPC-I) and uncoated specimens (HSC-N, OPC-N)
Summary
Waterproofing technology to prevent water leakage underneath apartments is regarded as an important safety technology for construction quality that prevents safety-related accidents and protects national infrastructure and facilities [1]. In many cases, humidity in concrete surfaces is constantly present in underground spaces [3], so it is generally accepted that complete waterproofing cannot be practically achieved in underground structures [4]. A type of interior waterproofing material that allows leakage in the underground spaces of apartments may hinder the long-term safety of the underground structures, reduce the service life, or damage interior materials as a result of dew condensation [6], which have become major sources of deterioration to residents’ living environments.
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