| 摘要: |
| 为了研究高吸水性树脂（SAP）对混凝土孔隙特征及抗压强度的影响，采用干拌方法拌制SAP混凝土，基于压汞和抗压试验，对2种配合比和3种SAP掺量的混凝土进行分批试验，测定各组试样的内部孔结构特征参数和抗压强度.结果表明：混凝土的比孔容积、孔隙率、最可几孔径与SAP掺量呈正比关系；掺加SAP后，混凝土的抗压强度与比孔容积、孔隙率、最可几孔径呈反比关系；随着SAP掺量的增加，小于10μm的孔隙率呈增大趋势，而大于10μm的孔隙率无明显的变化规律. |
| 关键词: 压汞试验 高吸水性树脂 混凝土 孔隙特征 |
| DOI：103969/j.issn.1007 9629201801022 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51309179） |
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| Pore Structure Characteristics of SAP Concrete Based on Mercury Intrusion Test |
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GUO Yaohua, DING Hongyan, ZHANG Puyang, ZHANG Lei
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School of Civil Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| In order to study the variation of internal pore structure characteristics and the compressive strength of concrete specimens, super absorbent polymer(SAP) concrete was mixed with dry mixing method. Based on mercury intrusion test and compression test, concretes with 2 kinds of mix proportions and 3 kinds of SAP contents were tested in this batch test to determine the internal pore structure parameters and compressive strength. Results show that the SAP content is proportional to pore volume, porosity and pore diameter. After adding SAP, the compressive strength of concrete is inversely proportional to specific pore volume, porosity and pore diameter. With the increase of the SAP content, the fractional porosity of less than 10μm is increased, while the fractional porosity of more than 10μm has no significant variation. |
| Key words: mercury intrusion test super absorbent polymer concrete pore structure characteristic |
