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This paper describes the effects of high temperatures on
the strength characteristic of crushed limestone sand concrete (CLSC). To
compare, natural (river) sand concrete (NSC) and CLSC specimens were exposed to
the three different high temperatures. Visual color-change and weight loss were
also carefully examined through the tests. The test results indicated that the
decreasing rate of compressive strength of CLSC after exposure to high
temperature is slightly lower than that of NSC while the splitting tensile
strength of CLSC indicated a very similar rate compared to NSC. Therefore, the
strength variations of crushed limestone sand concrete after exposal to high
temperature can be similarly treated as that of the natural sand concrete. Also
it can be seen that the CLSC can use 0.5 power law equation to represent the relationship
between compressive and splitting tensile strength before and after exposal to high
Based on statistical amount of traffic and weather data sets from three weigh-in-motion sites for the study period of from 2005 to 2009, permanent traffic counters and weather stations in Alberta, Canada, an investigation is carried out to study impacts of winter weather on volume of passenger car and truck traffic. Multiple regression models are developed to relate truck and passenger car traffic variations to winter weather conditions. Statistical validity of study results are confirmed by using statistical tests of significance. Considerable reductions in passenger car and truck volumes can be expected with decrease in cold temperatures. Such reductions are higher for passenger cars as compared to trucks. Due to cold and snow interactions, the reduction in car and truck traffic volume due to cold temperature could intensify with a rise in the amount of snowfall. For passenger cars, weekends experience higher traffic reductions as compared to weekdays. However, the impact of weather on truck traffic is generally similar for weekdays and weekends. Interestingly, an increase in truck traffic during severe weather conditions is noticed at one of the study sites. Such phenomenon is found statistically significant. None of the past studies in the literature have presented the possibility of traffic volume increases on highways during adverse weather conditions; which could happen due to shift of traffic from parallel roads with inadequate winter maintenance programs. It is believed that the findings of this study can benefit highway agencies in developing such programs and policies as efficient monitoring of passenger car and truck traffic, and plan for efficient winter roadway maintenance programs.
We conducted this study to analyze the quality of life using the SF-36 health questionnaire and the MSTS scores depending on surgical method and the primary site of occurrence. On the surgical method, the limb salvage had more excellent outcomes (60.9) than the amputation (46.3). The tumor prosthetic replacement had notably higher scores (62.5) than any other methods. For the correlation coefficients on the MSTS and SF-36, the Physical Function had the highest degree of correlation. Excellent functions of the extremities would lead to a good quality of life.