UR2：用于煅烧粘土实时、低成本质量控制的超快速反应性测试

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-02-10 DOI:10.1016/j.cemconres.2025.107806

Yujia Min, Hossein Kabir, Chirayu Kothari, M. Farjad Iqbal, Nishant Garg

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引用次数: 0

摘要

为了减少水泥的碳足迹，人们对商业采用可持续的scm（如煅烧粘土）越来越感兴趣。然而，现有的ASTM标准（R3测试，C1897）测试这种粘土的反应性需要长达7天的时间，不能用于工业环境中的实时质量控制。我们通过引入5分钟超快速反应性（UR2）测试来解决这个问题。通过将47个粘土样品溶解在4 M NaOH溶液中，在90°C下，我们报告了1.54Al + Si的溶解指数与7天的R3热量密切相关（R2 = 0.92, RMSE = 94.1 J/g）。该溶解指数也与14种粘土混合物的28天抗压强度相关（R2 = 0.94, RMSE = 1.7 MPa）。这种UR2测试依赖于比色法，可以通过现成的低成本相机进行。总的来说，我们新的UR2测试为实时、低成本的煅烧粘土质量控制开辟了一条途径。

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UR2: Ultra-rapid reactivity test for real-time, low-cost quality control of calcined clays

To reduce cement's carbon footprint, there is growing interest in commercial adoption of sustainable SCMs such as calcined clays. However, the existing ASTM standard (R³ test, C1897) to test the reactivity of such clays takes up to 7 days and cannot be used for real-time quality control in an industrial setting. We address this issue by introducing a 5-min Ultra-Rapid Reactivity (UR²) test. By dissolving 47 clay specimens in 4 M NaOH solutions at 90 °C, we report that a dissolution index of 1.54Al + Si correlates strongly to the 7-day R³ heat (R² = 0.92, RMSE = 94.1 J/g). This dissolution index also correlates to the 28-day compressive strength for 14 clay mixtures (R² = 0.94, RMSE = 1.7 MPa). This UR² test relies on colorimetry and can be conducted via off-the-shelf, low-cost cameras. Overall, our new UR² test opens a pathway for real-time, low-cost quality control of calcined clays.

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.