Controlling the Interaction Between Carbon Dioxide and Cementitious Materials Using Biomimetic Molecules

使用仿生分子控制二氧化碳和胶凝材料之间的相互作用

• 批准号: 2028462
• 负责人: Warda Ashraf
• 金额: $ 49.2万
• 依托单位: University of Texas at Arlington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-12-15 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2028462&HistoricalAwards=false
• 关键词: Controlling; Interaction; Between; Carbon; Dioxide

This research aims to make sustainable infrastructure materials, including supplementary cementitious materials (SCMs) and alkali-activated materials (AAM), last longer by reducing their deterioration when these are exposed to carbon dioxide. This research will further contribute to the low-carbon future by advancing the understanding and applications of cementitious materials that can directly serve as carbon dioxide sinks. The outreach effort of this research involves developing a multidisciplinary workforce with faculty members and students from civil engineering, materials science, and chemistry to address the challenges of creating sustainable and durable materials for civil infrastructures. The direct educational benefits include mentored research opportunities for undergraduate and high school students as well as underrepresented groups. These opportunities will provide students with exposure to advanced research facilities and motivate them to pursue higher education in the field of infrastructure materials. This research will capitalize on the biomimetic approaches of engineering the growth, aggregation, and characteristics of in-situ precipitated calcium carbonate particles to control the interaction between cementitious materials and carbon dioxide. The specific objectives include: (i) determining the effectiveness of in-situ precipitated metastable calcium carbonate (mCaCO3) and calcium carbonate-organic hybrid (mCOH) phases to avoid degradation of calcium silicate hydrate (C-S-H) and calcium aluminum silicate hydrate (C-A-S-H) gel phases when exposed to external carbon dioxide, thus enhancing the carbonation resistance of cementitious composites containing AAMs and SCMs; (ii) investigating how biomimetic molecules can be used to precipitate specific mCaCO3 with controlled morphologies and properties in carbonation cured matrices so that their in-situ formations can be leveraged to develop high-performance cementitious matrices; (iii) investigating the functional relationship between biomimetic molecules and the polymorphic crystallization of calcium carbonate particles, and therefore, developing non-natural and affordable biomimetic molecules that can be used as chemical admixtures in cementitious materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项研究旨在制造可持续的基础设施材料，包括补充胶结材料（SCM）和碱激活材料（AAM），持续时间持续更长的时间，即在暴露于二氧化碳的情况下降低其恶化。这项研究将通过推进可以直接用作二氧化碳水槽的胶合材料的理解和应用来进一步促进低碳未来。这项研究的外展工作涉及与土木工程，材料科学和化学的教职员工和学生一起开发跨学科的劳动力，以应对为民用基础设施创造可持续耐用的材料的挑战。直接的教育益处包括针对本科和高中生的指导研究机会以及代表性不足的群体。这些机会将为学生提供高级研究机构的接触，并激励他们在基础设施材料领域接受高等教育。这项研究将利用工程的仿生方法的生长，聚集和特征，其原位沉淀的碳酸钙颗粒以控制胶合材料与二氧化碳之间的相互作用。具体目标包括：（i）确定原位沉淀的碳酸钙（MCACO3）和碳酸钙 - 有机杂化（MCOH）阶段的有效性，以避免钙硅酸盐水合物（c-S-H）和钙铝硅酸盐（C-A-S-H）的含量在硅酸盐（C-A-S-H）中降解，从而增强了硅水合物（C-A-S-H）凝胶的碳纤维，碳纤维的碳纤维均在碳纤维中降解，碳纤维的碳纤维的碳水化合物（C-A-S-H）的脑碳酸脑（C-A-S-H）的脑电图。含有AAM和SCM的胶结复合材料； （ii）研究如何使用仿生分子在碳酸化固化基质中以受控形态和特性沉淀特定的MCACO3，以便可以利用其原位地层来开发高性能的胶结质矩阵； （iii）研究碳酸钙颗粒的生物象征分子与多态性结晶之间的功能关系，因此，开发了可以用作水泥材料中化学混合物的化学混合物的非天然和负担得起的二物分子，这些奖项反映了NSF的法定任务和经过评估的依据。

项目成果

Carbon sequestration in graphene oxide modified cementitious system

• DOI: 10.1016/j.jobe.2022.105356
• 发表时间: 2022-10
• 期刊: Journal of Building Engineering
• 影响因子: 6.4
• 作者: G. Mishra;Ashraf Warda;Surendra P. Shah

Effects of magnesia in semi-hydraulic and non-hydraulic calcium silicate binders during carbonation curing

半水硬和非水硬硅酸钙粘结剂碳化养护过程中氧化镁的影响

• DOI: 10.1016/j.conbuildmat.2022.127628
• 发表时间: 2022
• 期刊: Construction and Building Materials
• 影响因子: 7.4
• 作者: Khan, Rakibul I.;Siddique, Salman;Ashraf, Warda
• 通讯作者: Ashraf, Warda

A comparative investigation on the effects of nanocellulose from bacteria and plant-based sources for cementitious composites

• DOI: 10.1016/j.cemconcomp.2021.104316
• 发表时间: 2021-11-05
• 期刊: CEMENT & CONCRETE COMPOSITES
• 影响因子: 10.5
• 作者: Haque, Muhammad Intesarul;Ashraf, Warda;Shah, Surendra
• 通讯作者: Shah, Surendra

Amino acids as performance-controlling additives in carbonation-activated cementitious materials

• DOI: 10.1016/j.cemconres.2021.106501
• 发表时间: 2021-06-15
• 期刊: CEMENT AND CONCRETE RESEARCH
• 影响因子: 11.4
• 作者: Khan, Rakibul I.;Ashraf, Warda;Olek, Jan
• 通讯作者: Olek, Jan

Role of biopolymers in enhancing multiscale characteristics of carbonation-cured cementitious composites

• DOI: 10.1016/j.cemconcomp.2022.104766
• 发表时间: 2022-09
• 期刊: Cement and Concrete Composites
• 影响因子: 10.5
• 作者: Rakibul I. Khan;Muhammad Intesarul Haque;W. Ashraf;Surendra P. Shah;Navid Saleh