高鋁活性粉與矽灰應用於多孔隙混凝土路面面層之研究

A Study on Porous Concrete Pavement Containing High Alumina Reactive Powder and Silica Fume

劉家政(Liu, Jiazheng)

指導教授 ： 劉明仁

淡江大學/工學院/土木工程學系碩士班/碩士(2008年)

https://doi.org/10.6846/TKU.2008.00206

摘要

多孔隙混凝土具有良好排水、吸音與抗滑能力，適合鋪設於台灣濕熱環境。由於多孔隙混凝土之孔隙率高，強度低於一般混凝土，應用範圍受到侷限。高鋁活性粉混凝土具有優越之抗壓、抗彎強度，本研究主要目標在結合多孔隙混凝土與高鋁活性粉混凝土之特性，製作多孔隙高鋁活性粉混凝土;另一目標則結合多孔隙混凝土和矽灰混凝土之特性，製作多孔隙矽灰混凝土，以改善其力學性質與驗證其績效。本研究多孔隙高鋁活性粉混凝土之訴求在其強度發展約三天即可到達28天齡期強度之80-90%，多孔隙矽灰混凝土則著重在長期強度，發展之兩種材料可提供鋪面工程選擇排水鋪面面層材料更多選擇。
根據本研究試驗結果，獲得初步結論歸納如下：
1.本研究實驗組（高鋁水泥與第一型波特蘭水泥固定比例混合）中水泥砂漿膨脹劑添加量為12%時之早期抗壓強度發展比添加量為10%或8%時快，惟實驗組中膨脹劑添加量為12%時之長期抗壓強度發展則比10%、8%差。因此本研究高鋁活性粉水泥砂漿試驗結果發現，實驗組之膨脹劑最適添加量為10%或8%。本研究控制組（完全使用高鋁水泥）之膨脹劑添加量僅嘗試12%，強度發展表現尚佳。
2.本研究混凝土抗壓強度試驗結果顯示，使用高鋁活性粉砂漿與常溫養護之方法，已可使多孔隙活性粉混凝土之28天齡期抗壓強度超越280 kg/cm2。使用矽灰水泥漿體與常溫養護之方法，亦可使多孔隙矽灰混凝土之28天齡期抗壓強度超越280 kg/cm2。
3.本研究多孔隙混凝土（孔隙率約15%）PHARPC組之3天抗壓強度約為270.0 kgf/cm2，PSFC組約為231.0 kgf/cm2，PC組約為158.9 kgf/cm2。其中PHARPC組之強度發展在3天即可接近其七天抗壓強度（305.6 kgf/cm2）之88.4 %。
4.本研究混凝土抗彎強度試驗結果顯示，PHARPC組與PSFC組之28天齡期抗彎強度皆超過40 kgf/cm2。其中PSFC組約為45.92 kgf/cm2，達到台灣區國道一般水泥混凝土路面之設計抗彎強度（45 kg/cm2）。
5.本研究透水試驗結果顯示，所有組別皆符合規範要求，滲透係數皆大於0.01 cm/sec。Cantabro磨耗試驗結果顯示，PHARPC組與PSFC組皆能提供良好之抗磨耗能力（磨耗百分比約為11.5%），兩者皆優於PC（控制組）。抗滑能力試驗結果顯示多孔隙高鋁活性粉混凝土與多孔隙矽灰混凝土皆具有良好之路面抗滑能力。

關鍵字

多孔隙混凝土 ； 高鋁水泥 ； 高鋁活性粉混凝土 ； 多孔隙高鋁活性粉混凝土 ； 抗彎強度 ； 磨耗試驗 ； 滲透係數

並列摘要

The low strength of porous concrete (PC) due to high air voids results in the limitation of its application. High alumina reactive powder concrete (RPC), however, has superior compressive and flexural strength. The first objective of this study was to combine the unique characteristic of porous concrete and high alumina reactive powder concrete, and develop the porous high alumina reactive powder concrete (PHARPPC). The second objective was to combine the porous concrete and silica fume concrete to develop the porous silica fume concrete (PSFC). PHARPPC and PSFC had improved mechanical properties, and hopefully could be an alternative for the rigid pavement construction.

Major findings based on the results of our tests were summarized as follows:
1.The results of mortar tests showed that the compressive strength development of experiment group (HAC and Type I portland cement mixes) with expansive agent dose rate set at 12% was better than that with 10% and 8%. It was found that the most suitable dose rate of expansive agent was 10% or 8% for the experiment group. 12% was the only one dose rate of set for the control group (HAC alone mixes) and later found adequate.
2.Results of compressive strength tests showed that the PHARPPC using high alumina reactive powder mortar and normal temperature curing exhibited 28-day strengths greater than 280 kg/cm2. Also found was that the PSFC using silica fume paste and normal temperature curing resulted in 28-day strengths greater than 280 kg/cm2.
3.The PHARPC had 3-day compressive strengths of 270.0 kg/cm2, PSFC of 231.0 kg/cm2, and PC of 158.9 kg/cm2. The PHARPC’s 3-day compressive strengths had been approaching 88.4% of its 7-day compressive strengths (305.6 kg/cm2).
4.The results showed that the PHARPC and the PSFC had 28-day flexural strengths greater than 40 kg/cm2, while the PSFC had 28-day flexural strengths greater than the design strength of 45 kg/cm2 specified in the TANEEB’s specifications.
5.The permeability test results showed that PHARPC, PSFC and PC all had good drainage ability (≧0.01cm/sec). Cantabro abrasion test results showed that PHARPC and PSFC had good abrasion resistance. Results of British Pendulum tests showed that PHARPC and PSFC both provided good skid resistance.

並列關鍵字

porous concrete ； high alumina cement ； high alumina reactive powder concrete ； high alumina reactive powder porous concrete ； flexural strength ； Cantabro test ； permeability

參考文獻

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