Effect of crystalline admixtures on the self-healing capability of early-age concrete studied by means of permeability and crack closing tests

被引：216

作者：

Roig-Flores, M. ^{[1
]}

Pirritano, F. ^{[2
]}

Serna, P. ^{[1
]}

Ferrara, L. ^{[2
]}

机构：

[1] Univ Politecn Valencia, Inst Concrete Sci & Technol, ICITECH, 4N Bldg,Camino Vera S-N, E-46022 Valencia, Spain

[2] Politecn Milan, Milan, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 114卷

关键词：

Concrete; Self-healing; Autogenous; Crystalline admixtures; Permeability; Durability; CEMENTITIOUS COMPOSITES; BEHAVIOR;

D O I：

10.1016/j.conbuildmat.2016.03.196

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper analyzes the self-healing properties of early-age concretes, engineered using a crystalline admixture (4% by the weight of cement), by measuring the permeability of cracked specimens and their crack width. Two concrete classes (C30/37 and C45/55) and three healing exposure conditions have been investigated: water immersion at 15 C, at 30 degrees C and wet/dry cycles. Specimens were pre-cracked at 2 days, to values of crack width in the range of 0.10-0.40 mm. The results show almost perfect healing capability for specimens healed under water at 30 degrees C, better than for specimens healed under water at 15 degrees C, while insufficient for the wet/dry exposure. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：447 / 457

页数：11

共 28 条

[1] Crack Self-healing Behavior of Cementitious Composites Incorporating Various Mineral Admixtures [J].

Ahn, Tae-Ho ;

Kishi, Toshiharu .

JOURNAL OF ADVANCED CONCRETE TECHNOLOGY, 2010, 8 (02) :171-186

[2]

[Anonymous], 2010, 2123R10 ACI, P46

[3]

Canovas M.F., 1994, Patologia y Terapeutica del Hormigon Armado", Colegio de Ingenieros de Caminos, Canales y puertos, V3

[4]

De Rooij M., 2011, RILEM STATE OF THE A

[5] Three designs for the internal release of sealants, adhesives, and waterproofing chemicals into concrete to reduce permeability [J].

Dry, CM .

CEMENT AND CONCRETE RESEARCH, 2000, 30 (12) :1969-1977

[6]

Edvardsen C., 1999, ACI MAT J

[7] A "fracture testing" based approach to assess crack healing of concrete with and without crystalline admixtures [J].

Ferrara, Liberato ;

Krelani, Visar ;

Carsana, Maddalena .

CONSTRUCTION AND BUILDING MATERIALS, 2014, 68 :535-551

[8] Self-sealing, autogenous healing and continued hydration: What is the difference? [J].

Hearn, N .

MATERIALS AND STRUCTURES, 1998, 31 (212) :563-567

[9]

Heide N. Ter, 2005, CRACK HEALING HYDRAT

[10]

Hosoda A, 2009, CONCRETE REPAIR, REHABILITATION AND RETROFITTING II, P121

← 1 2 3 →