Capillary flow characteristics of an autogenic and autonomic healing agent for self-healing cementitious systems

The ability to predict the capillary flow of healing agents within discrete cracks in concrete will facilitate the development of efficient self-healing cementitious materials which will in turn deliver economic, environmental and social benefits, such as reduced maintenance and repair costs and reduced use of natural resources associated with the repair and maintenance of civil engineering infrastructure. This dataset presents the flow characteristics of healing agents in a range of glass capillaries and channels formed of concrete of differing strengths. The flow characteristics considered for cyanoacrylate, water and a suspension of GGBS in water are:

(i) The Hagen-Poiseuille (H-P) flow characteristics. MS Excel files giving the flow rate of the healing agents through a range of head heights (750-1600mm), a range of capillary tube radii (0.4-0.6mm) and length (100-300mm). The data was captured from interrogation of a number of high speed video sequences/images.

(ii) Time-surface tension relationship. Lauda TVT1 Drop-volume tensiometer used to examine the surface tension of the healing agents. Drop rate and drop time were amended to determine their influence on the surface tension and any variation of surface tension with time. Data, extracted from the tensiometer during the test, is presented in MS Word files.

(iii) Time-contact angle measurements. Photos taken of sessile drops of the healing agents on 3 substrates (glass, saturated and unsaturated concrete). Image J drop snake analysis (freely available on-line) was used to obtain the contact angles of the drops. The data is presented in an MS Excel file, giving the average sessile drop contact angle for each healing agent/substrate.

(iv) Time-viscosity relationship. Data collected via high speed video for a bespoke viscometer. The movement of the healing agent free surface is recorded over time and multiple repeats of the test are given for the healing agent and concrete channel. The results are available in MS Excel files.

(v) Numerical simulation of viscosity and capillary rise was conducted using previously developed and documented MathCad models.

Research results based upon these data are published at https://doi.org/10.1061/(ASCE)MT.1943-5533.0002092