US 11,982,608 B2
Method for testing surface energy of aggregate based on static drop method
Rong Luo, Wuhan (CN); Jing Luo, Wuhan (CN); Chongzhi Tu, Wuhan (CN); Tingting Huang, Wuhan (CN); Xiang Wang, Wuhan (CN); Longchang Niu, Wuhan (CN); and Qiang Miao, Wuhan (CN)
Assigned to WUHAN UNIVERSITY OF TECHNOLOGY, Wuhan (CN)
Filed by WUHAN UNIVERSITY OF TECHNOLOGY, Wuhan (CN)
Filed on May 27, 2022, as Appl. No. 17/826,171.
Claims priority of application No. 202110802076.6 (CN), filed on Jul. 15, 2021.
Prior Publication US 2023/0017016 A1, Jan. 19, 2023
Int. Cl. G01N 13/02 (2006.01)
CPC G01N 13/02 (2013.01) [G01N 2013/0208 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for testing surface energy of aggregate based on static drop method, comprising the following steps:
(1) aggregates grinding and pretreatment: dividing the original aggregates into two groups, one group is subjected to surface grinding and pretreatment and recorded as polished aggregate, and the other group is not treated and recorded as original aggregate;
(2) obtaining the surface texture index: testing the surface texture of the original aggregate and the polished aggregate to obtain the surface texture index of the original aggregate and the surface texture index of the polished aggregate, respectively;
wherein testing the surface texture of the original aggregate and the polished aggregate comprises:
fixing aggregate sample of the original aggregate on aggregate tray of AIMS system, using the AIMS system to test the surface texture of the aggregate sample of the original aggregate, and calculating the surface texture index of the original aggregate after averaging test results;
fixing aggregate samples of the polished aggregate on the aggregate tray, and photograph polished surfaces of the aggregate samples of the polished aggregate: after taking the average of shooting results, calculating the surface texture index of the polished aggregate:
(3) calculating the surface energy based on static drop method experiment: using static drop method to test contact angle of the polished aggregate, and calculating the surface energy of the polished aggregate;
wherein on a surface of the aggregate sample of the polished aggregate, an intersection of a droplet received by the surface and a projection of the received droplet is defined as a baseline, an angle between a tangent at the intersection of the droplet and the baseline is defined as the contact angle;
wherein calculating the surface energy of the polished aggregate comprises:
bringing the contact angle into the Young-Dupre equation; and
obtaining the surface energy parameters by using programming solution;
wherein the surface energy of the polished aggregate is calculated as:
2(√γSLWγLLW+√γS+γL−+√γS−γL+)=γL(1+cosθ);
wherein the surface energy parameters include γSLW, γLLW, γS+, γS−, γL+, γL−, and γL, among, γSLW is the non-polar component of the surface energy of solid material, γLLW is the non-polar component of the surface energy of liquid material, γS+ is the polar acid component of the surface energy of solid material, γS− is the polar alkali component of the surface energy of solid material, γL+ is the polar acid component of the surface energy of liquid material, γL− is the polar alkali component of the surface energy of the liquid material, γL is the surface tension of the liquid with a unit of erg/cm2, θ is the contact angle between the solid-liquid-gas phase;
(4) fitting to obtain a functional relationship between the surface texture index and surface energy: performing fitting based on the surface texture index of the polished aggregate and the surface energy of the polished aggregate, and obtaining a functional relationship between the surface texture index of the polished aggregate and the surface energy of the polished aggregate;
(5) calculating the surface energy of the original aggregate: bringing the surface texture index of the original aggregate into the functional relationship between the surface texture index of the polished aggregate and the surface energy of the polished aggregate to obtain the surface energy of the original aggregate.