Basic Study on Term of Warranty Liability for Water Supply, Drainage, and Sanitation Arrangement Work Defect in Apartment Building
The defect lawsuit of the apartment which is the representative residential style of Korea continues and becomes a social problem. In the defect lawsuit, the term of warranty liability is a period that can demand the defect repair according to defect occurrence, and the exclusion period of the exercise of rights. However, the term of warranty liability stipulated in relevant laws such as Enforcement Decree of the Housing Act is being changed arbitrarily, without any established grounds. Therefore, a reasonable standard for establishing the term of warranty liability is required. In this study, the defects of water supply, drainage and sanitation arrangement work were studied. As a result of analyzing the number of defect occurrence in the apartment, it was shown that the defects in water supply, drainage and sanitation arrangement work occurred more than 80% in the 1st ∼ 2nd year after completion. However, the occurrence of defects from the 3rd year was extremely slight. On the other hand, it was confirmed that the defect occurrence continued until fairly late point of time as the end point of time of the defects was in the 7th to 9th years.
Basic Study on Term of Warranty Liability for Window and Door Work Defect in Apartment Building
In Korea, as lawsuits surrounding the defects of apartments, which are the main housing of the people, are rapidly, it is becoming a social problem. Although the term of warranty liability is the exclusion period of the claim for defect repair, there is no basis for establishing related systems. Since the consequences of defect lawsuits vary greatly according to the term of warranty liability, it has very important meaning for business subject and division owner. Therefore, the definition and period setting for the term of warranty liability should be reasonable. In this study, as a result of reviewing the history of laws and regulations related to the term of warranty liability, any document of grounds could not be found. In addition, it is confirmed the limitations of the institutional aspect that it has never been able to present objective grounds once in several revisions. On the other hand, in order to supplement for this, this study analyzed the trend of defects occurring every year for window and door work defects of apartments. We investigated defects of window and door work in 177 apartment complexes, total of 125,816 households, and as a result of analysis, window and door work showed many defects occurring in the first and second year, and extremely few after the third year. On the other hand, there was a slight difference by the detailed construction type, but there was less variation than the finish work subjected in the previous study.
Preparation and performance evaluation of swine manure bio-oil modified rubber asphalt binder
Abstract In order to study the effect of the preparation process of swine manure bio-oil modified rubber asphalt binder on the rheological properties of the binder, the matrix asphalt and asphalt rubber were used as the control group, and swine manure bio-oil modified rubber asphalt binders were obtained by three preparation processes. Then the rheological properties of five binders were evaluated by rotational viscosity, DSR, MSCR and BBR tests. The results show that the addition of swine manure bio-oil to asphalt rubber is beneficial to the workability, but cause negative effect on its high temperature performance, fatigue performance and low temperature crack resistance. The preparation method of premixing bio-oil and rubber powder can reduce the degradation of high-temperature performance of asphalt rubber caused by addition of swine manure bio-oil to a certain extent. The fatigue properties of the three bio-binders are close, and the critical temperature is less than 25 °C. The process of premixing bio-oil and rubber powder will increase the creep stiffness and reduce the low-temperature performance. However, the low-temperature performance of the binder obtained by this process is still better than that of the matrix asphalt and can meet the requirements of use. Therefore, it is recommended to use the preparation process of premixing bio-oil and rubber powder to prepare swine manure bio-oil modified asphalt rubber.