วารสารวิชาการเทคโนโลยีอุตสาหกรรม (J. Ind. Tech.) อยู่ในฐานข้อมูล Thai-Journal Citation Index Centre (TCI) กลุ่ม 1 (2564 - 2567) และ Asean Citation Index (ACI) มีค่า JIF = 0.094 และ T-JIF (3 ปีย้อนหลัง): 0.165 | The Journal of Industrial Technology (J. Ind. Tech.) is indexed in Thai-Journal Citation Index Centre (TCI) Tier 1 (2021 - 2024) and Asean Citation Index (ACI) with impact factor, T-JIF: 0.094 and 3-years T-JIF: 0.165

Compressive Strength and Treatment Efficiency of Nitrogen-Dioxide of Paving Block Made of Concrete Mixing with Titanium-Dioxide
Type Of : Academic Manuscript
Type : Civil Engineering
This research studied the treatment efficiency of Nitrogen-dioxide (NO2) in air using concrete paving block containing Titanium-dioxide (TiO2) which were 5x5x5 cm3 cubic specimens. They were plastered with concrete mixed with TiO2 in the percentage of 0, 5, 10, and 15 by weight for the top layer of the specimens at 1 cm. This research studied the effect of doges of TiO2 on compressive strength at the age of 3, 7, 14, and 28 days and the NO2 treatment in air. The 28-cured days of specimens treated NO2 for several cycles (48 hours / cycle). The results showed that the doges of TiO2 did not effect on the compressive strengths of concrete paving block which was higher than designed mixes. For NO2 treatment, the treatment efficiency of concrete paving block containing 15 wt.% of Titanium-dioxide had higher than the specimens. The 1st cycle for treatment had the efficiency of 48% and decreased when retreated in next cycles. At the 7 th cycles, the efficiency of concrete paving block decreased to lower than 10%. After that the tested specimens were polished in order to remove the surface of concrete paving block for 0.1 cm. and retested. The efficiency of retested specimens was similar to new specimens. The polished surface of concrete paving block was stimulated corrosion on pathway and road. In addition, concrete paving block containing Titanium-dioxide were soaked in diluted Sulfuric acid in order to stimulated contact with acid rain. The results showed that concrete paving block containing Titanium-dioxide soaked in diluted Sulfuric acid (pH = 5) had the strength development and NO2 treatment efficiency were lower than when compared with specimens which soaked in water about 10 to 20 percent
Date01/07/2019 263

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