马来松香基Gemini表面活性剂在低压条件下对混凝土的引气作用

Q2 Materials Science

Revista de Chimie Pub Date : 2021-05-07 DOI:10.37358/RC.21.2.8417

Yang Li, Zhendi Wang, Ling Wang

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引用次数: 0

摘要

高原地区低气压条件下，混凝土中引气剂(AEA)的有效性下降。合成了一种新型AEA，称为MRE，以提高低气压下新鲜混凝土中的气泡稳定性。对MRE溶液和MRE混凝土在60 kPa和100 kPa条件下的性能进行了测试，并与商业gemini AEA (DCC)进行了对比。试验结果表明，MRE和DCC溶液在60 kPa下的泡沫体积比在100 kPa下分别减小了3%和9%。MRE的气泡液膜强度比DCC高63%。对于MRE和DCC在60 kPa下的混凝土，空气含量分别比100 kPa下降低2%和16%，混凝土的相对动模量分别降低6%和15%，气泡间距系数在60 kPa下分别提高17%和39%。MRE可在不影响混凝土强度的情况下增加混凝土在低气压下的抗冻融能力，适用于高空混凝土。

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Maleic Rosin-based Gemini Surfactant as Air Entraining Agent for Concrete under Low Air Pressure

The effectiveness of Air entraining agent (AEA) in concrete under low air pressure in the plateau area decreased. A type of new AEA, named MRE was synthesized to increase bubbles' stability in fresh concrete under low air pressure. The performance of MRE solution and concrete with MRE were tested under 60 kPa and 100 kPa compared with commercially gemini AEA (DCC). The test results showed that the foam volume of MRE and DCC solution under 60 kPa was reduced by 3% and 9% than under 100 kPa. The bubble liquid film strength of MRE is 63% higher than that of DCC. For concrete with MRE and DCC under 60 kPa, the air content was 2% and 16% lower, the relative dynamic modulus of concrete reduced by 6% and 15%, and the bubble spacing factor under 60 kPa increased by 17% and 39% respectively compared with that under 100 kPa. MRE can increase the freeze-thaw resistance of concrete under low air pressure without affecting concrete strength and is suitable for high altitude concrete.

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来源期刊

Revista de Chimie 化学-工程：化工

自引率

0.00%

发文量

审稿时长

3-6 weeks

期刊介绍： Revista de Chimie publishes original scientific studies submitted by romanian and foreign researchers and offers worldwide recognition of articles in many countries enabling their review in the publications of other researchers. Published articles are in various fields of research: * Chemistry * Petrochemistry * Chemical engineering * Process equipment * Biotechnology * Environment protection * Marketing & Management * Applications in medicine * Dental medicine * Pharmacy