混凝土是全球第二大消耗品，水泥生產所排放的二氧化碳更占全球溫室氣體總排放量約 8 %。隨著全球二氧化碳濃度日益攀升，各國政府積極推動碳減排政策。我國亦已通過《氣候變遷因應法》，目標在2050年達成淨零碳排放。由於水泥業屬於碳排放密集產業，因此產業界積極尋求可有效降低碳排的替代材料，其中卜特蘭石灰石水泥（PLC）具有降低製程碳排放之優勢，提供工程界降低碳排放的其中一個方法。
本研究旨在探討卜特蘭石灰石水泥混凝土（PLC）梁構件的耐震性能。本研究製作兩種材料梁試體，包括一般卜特蘭水泥混凝土（OPC）與PLC混凝土，設計兩種不同剪跨比（2與4）的梁試體進行反覆側推實驗，實驗變因為混凝土材料以及梁的剪力跨度比，以評估其耐震性能。
實驗結果顯示，卜特蘭石灰石水泥混凝土在抗壓強度及方面與傳統卜特蘭一型混凝土表現相近，並且彈性模數與建築物混凝土結構設計規範所建議的公式相近。綜合試體裂縫發展、遲滯迴圈、包絡線、各項耐震性能評估，卜特蘭石灰石水泥混凝土在梁構件耐震性能表現上與一般卜特蘭水泥混凝土無顯著差異，且PLC具有降低碳排放之優勢，顯示其作為低碳結構材料的可行性與可靠性。並且使用結構分析軟體ETABS搭配TEASPA與SERCB之模擬結果與實驗數據比較顯示，兩者皆能有效預測PLC與OPC試體的整體側向力－位移行為趨勢。
綜合而言，研究驗證了PLC混凝土在實現低碳減排目標同時，並且具有與OPC混凝土製成的梁構件相同的耐震性能，提供業界推廣低碳混凝土結構應用的重要依據。

The cement industry is the third-largest industrial energy consumer globally, accounting for approximately 6–7% of global anthropogenic carbon dioxide emissions and about 5% of man-made greenhouse gas emissions. Taiwan aims to achieve net-zero carbon emissions by 2050, and as the cement industry is a major domestic emitter, industry stakeholders have begun local research initiatives based on domestic and international findings. Recently, a low-carbon concrete using Portland Limestone Cement (PLC) has been proposed. According to prior studies, this material exhibits mechanical and durability behavior comparable to conventional Ordinary Portland Cement (OPC) concrete. In 2022, the national standard CNS 15286 was updated to include PLC, allowing up to 15% limestone powder content. Literature shows that replacing approximately 15% of clinker with limestone powder can reduce carbon dioxide emissions by about 12% on average.
To further understand the structural behavior of reinforced concrete made with PLC, a cyclic loading test on column specimens was conducted. The test included two OPC concrete columns as the control group and two PLC concrete columns as the experimental group. The variables were the type of concrete and axial load ratios of 10% and 30%. All columns were designed according to current building codes, with identical configurations aside from the defined variables.
The experimental results indicate that the compressive strength development of PLC concrete is similar to that of OPC concrete. Furthermore, the measured elastic modulus of PLC concrete aligns well with the values predicted by Taiwan's building structural design code. Comprehensive observations of crack development, hysteresis loops, envelope curves, and various seismic performance indicators, including bilinear idealization per FEMA 356 and performance evaluation per ACI 374.1-05, demonstrate that PLC and OPC concrete columns exhibit comparable structural behavior. Both materials provide reliable seismic performance. Additionally, numerical simulations using TEASPA+ETABS or SERCB+ETABS can accurately reproduce the force-displacement behavior observed in the experiments.

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