Influence of ageing of binder systems on the performance of additives
粘结剂体系老化对添加剂性能的影响
基本信息
- 批准号:224813219
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2012
- 资助国家:德国
- 起止时间:2011-12-31 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Chemical aging of the cement takes place during its exposure to atmospheric air. Generally, cement is very hygroscopic and promptly reacts with water and CO2. The aging can take place already during the manufacture and storage of cement. Such aging affects its physical, chemical and mechanical properties such as hydration, stiffening and development of compressive strength. Chemical admixtures such as superplasticizers, water retention agents and accelerators highly depend on the adsorption or composition of the pore solution of the cement to become effective. In this project effectiveness of superplasticizers with aged cement and cement clinker phases was investigated. For this study, methacrylic acid ester and allyl ether-based polycarboxylates (PCEs) were used. Additionally, the influence of aging on the effect of a retarder (sodium gluconate) was examined. It was found that the change of surface charge, resulting from aging, and subsequent agglomeration of the binder particles are the decisive factors for the different behavior of aged cement. These effects are caused by the formation of nanoscale hydrate phases (aging products) which strongly affect adsorption of superplasticizers. In the new project we plan to focus on mortar systems which are particularly rich in admixtures. Another goal is to achieve a deeper understanding of the interaction of admixtures and the influence of aging on the reaction equilibrium in complex binder systems. The results should allow to improve the robustness of mortars under various storage conditions.
水泥在暴露在大气空气中时会发生化学老化。一般来说,水泥具有很强的吸湿性,能迅速与水和二氧化碳发生反应。老化可能已经在水泥的制造和储存过程中发生。这种老化会影响其物理、化学和机械性能,如水化、硬化和抗压强度的发展。化学外加剂,如高效减水剂、保水剂和促进剂,高度依赖于水泥对孔隙溶液的吸附或组成才能发挥作用。在本项目中,研究了水泥熟料相和熟料相组成的高效减水剂的使用效果。在这项研究中,使用了甲基丙烯酸酯和烯丙基醚基聚羧酸酯(PCE)。此外,还考察了老化对缓凝剂(葡萄糖酸钠)效果的影响。研究发现,老化引起的表面电荷变化和粘结剂颗粒的团聚是老化水泥性能不同的决定性因素。这些影响是由纳米水合物相(老化产物)的形成引起的,它强烈地影响高效减水剂的吸附。在新的项目中,我们计划将重点放在砂浆系统上,这种系统含有特别丰富的外加剂。另一个目标是更深入地了解外加剂之间的相互作用以及老化对复杂粘结剂体系反应平衡的影响。研究结果应能提高砂浆在各种储存条件下的耐久性。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Impact of aging on the hydration of tricalcium aluminate (C3A)/gypsum blends and the effectiveness of retarding admixtures
老化对铝酸三钙 (C3A)/石膏混合物水化的影响以及缓凝外加剂的有效性
- DOI:10.1515/znb-2020-0087
- 发表时间:2020
- 期刊:
- 影响因子:0
- 作者:Hartmann FA;Plank J.
- 通讯作者:Plank J.
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Professor Dr. Johann Plank其他文献
Professor Dr. Johann Plank的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Professor Dr. Johann Plank', 18)}}的其他基金
Investigation on the replacement of lithium carbonate as accelerator for calcium aluminate cements and its underlying working mechanism
替代碳酸锂作为铝酸钙水泥促进剂及其作用机理研究
- 批准号:
429917653 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
Investigating the Rheological Behavior of Low Water-to-Cement Concretes Admixed With Superplasticizers and Co-Dispersants and the Underlying Dispersion Mechanism
研究掺有高效减水剂和助分散剂的低水灰比混凝土的流变行为及其分散机制
- 批准号:
387082770 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Priority Programmes
Wechselwirkung von Polycarboxylat-Fließmittel mit Tonmineralien im Beton
聚羧酸减水剂与混凝土中粘土矿物的相互作用
- 批准号:
222278199 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Research Grants
Tailoring cementitious materials with genetically, engineered microbial exopolysaccharides, a biologically inspired approach towards high-performance construction materials
用基因工程微生物胞外多糖定制水泥材料,这是一种受生物学启发的高性能建筑材料方法
- 批准号:
210721357 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Priority Programmes
Grundlagenuntersuchungen zum Einfluss von Fließmitteln im Ergänzungsbeton auf die Verbundfestigkeit bei nachträglich ergänzten Bauteilen
补充混凝土中高效减水剂对后续补充构件粘结强度影响的基础研究
- 批准号:
89311211 - 财政年份:2008
- 资助金额:
-- - 项目类别:
Research Grants
Einfluss von Zumahlstoffen auf die Wirkung von Fließmitteln in CEM II- und CEM III-Zementen
CEM II和CEM III水泥中添加剂对高效减水剂效果的影响
- 批准号:
40444368 - 财政年份:2007
- 资助金额:
-- - 项目类别:
Research Grants
Fließmittel für ultra-hochfesten Beton: Molekülstrukturen und Wirkmechanismen
超高强混凝土高效减水剂:分子结构和作用机制
- 批准号:
15479337 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Priority Programmes
Einfluss der Phasenzusammensetzung von Portlandzementen auf die Physisorption und Fließwirkung von Polykondensat- und Polycarboxylat-basierten Betonfließmitteln
波特兰水泥的相组成对缩聚物和聚羧酸盐混凝土增塑剂的物理吸附和流动性能的影响
- 批准号:
5455014 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Research Grants
Ecological and energetic optimization of concretes: Challenges in the processing of calcined illitic and smectitic clays - solution approaches using tailor-made superplasticizer structures
混凝土的生态和能量优化:煅烧伊利石和蒙脱石粘土加工中的挑战 - 使用定制超塑化剂结构的解决方案
- 批准号:
314833927 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Shear-Dependent Rheological Behavior of Ecologically Improved Cements Containing Calcined Clays as Clinker Substitute
含有煅烧粘土作为熟料替代品的生态改良水泥的剪切相关流变行为
- 批准号:
451444206 - 财政年份:
- 资助金额:
-- - 项目类别:
Priority Programmes
相似国自然基金
长非编码RNA Linc-RAM在Ageing导致的骨骼肌肌少症发生发展中的功能与分子机制
- 批准号:91949106
- 批准年份:2019
- 资助金额:68.0 万元
- 项目类别:重大研究计划
相似海外基金
An Integrated Life-course Approach for Person-centred Solutions and Care for Ageing with Multi-morbidity in the European Regions - STAGE; Stay Healthy Through Ageing
欧洲地区以人为本的解决方案和针对多种疾病的老龄化护理的综合生命全程方法 - STAGE;
- 批准号:
10112787 - 财政年份:2024
- 资助金额:
-- - 项目类别:
EU-Funded
The Whitehall II study: A core resource for ageing research
Whitehall II 研究:老龄化研究的核心资源
- 批准号:
MR/Y014154/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Research Grant
Cognitive imprecision and ageing: experimental investigation of new theories of decision-making
认知不精确与衰老:新决策理论的实验研究
- 批准号:
24K00237 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Grant-in-Aid for Scientific Research (B)
Ageing SLOw: Modelling Ageing in Secondary Lymphoid Organs in vitro
衰老缓慢:次级淋巴器官的体外衰老模型
- 批准号:
BB/Z515000/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Fellowship
FastMap-IMPACT: Brain mechanisms of rapid language learning: an Investigation of Memory in Patients and Ageing with Consolidation Theory
FastMap-IMPACT:快速语言学习的大脑机制:用巩固理论研究患者记忆和衰老
- 批准号:
EP/Y016815/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Fellowship
tRNA biology in healthy ageing: Functional differentiation and expression of tRNAiMet loci in Drosophila.
健康老龄化中的 tRNA 生物学:果蝇中 tRNAiMet 位点的功能分化和表达。
- 批准号:
BB/Y000919/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Research Grant
Sleep and circadian dysfunction in ageing and neurodegeneration: a life course and biomarker study of the British 1946 birth cohort.
衰老和神经退行性疾病中的睡眠和昼夜节律功能障碍:对英国 1946 年出生队列的生命历程和生物标志物研究。
- 批准号:
MR/Y009452/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Fellowship
Cellular Ageing: Is the Plasma Membrane the Control Hub?
细胞衰老:质膜是控制中心吗?
- 批准号:
DP240103193 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Discovery Projects
Understanding the role of cosmeceuticals in health, gender and ageing
了解药妆品在健康、性别和衰老方面的作用
- 批准号:
DE240100458 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Discovery Early Career Researcher Award
Mechanism for CD8+ T cell recognition and removal of senescent tissue cells during ageing
衰老过程中CD8 T细胞识别和清除衰老组织细胞的机制
- 批准号:
BB/Y003365/1 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Research Grant