US 12,345,683 B2
Methods for determining the young's modulus of a cementitious material
Na Lu, West Lafayette, IN (US); and Zhihao Kong, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Appl. No. 18/002,789
Filed by Purdue Research Foundation, West Lafayette, IN (US)
PCT Filed Jul. 1, 2021, PCT No. PCT/US2021/040067
§ 371(c)(1), (2) Date Dec. 21, 2022,
PCT Pub. No. WO2022/006383, PCT Pub. Date Jan. 6, 2022.
Claims priority of provisional application 63/062,998, filed on Aug. 7, 2020.
Claims priority of provisional application 63/047,771, filed on Jul. 2, 2020.
Prior Publication US 2023/0243781 A1, Aug. 3, 2023
Int. Cl. G01N 29/12 (2006.01); G01N 29/24 (2006.01); G01N 29/44 (2006.01); G01N 29/46 (2006.01); G01N 33/38 (2006.01)
CPC G01N 29/12 (2013.01) [G01N 29/2437 (2013.01); G01N 29/2475 (2013.01); G01N 29/4418 (2013.01); G01N 29/46 (2013.01); G01N 33/383 (2013.01); G01N 2291/014 (2013.01); G01N 2291/0232 (2013.01); G01N 2291/0251 (2013.01); G01N 2291/02827 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
locating a piezoelectric sensor within a cavity of a receptacle that is disposed within a cavity of a form, the cavity of the receptacle defined by one or more boundaries;
fixing the piezoelectric sensor in a predetermined position and orientation within the cavity of the form with the receptacle;
filling the cavity of the form defined by one or more boundaries with an uncured concrete mixture;
filling the receptacle with the uncured concrete mixture prior to, after, or simultaneously with the filling of the cavity of the form, wherein the uncured concrete mixture contacts or envelops the piezoelectric sensor within the form;
receiving an electrical signal from the piezoelectric sensor as the uncured concrete mixture cures within the form to define a concrete sample such that the piezoelectric sensor is embedded within the concrete sample;
determining an electrical signal-frequency spectrum of the electrical signal received from the piezoelectric sensor;
determining a resonant frequency of the concrete sample based on the electrical signal-frequency spectrum;
determining a Young's modulus of the concrete sample based on the resonant frequency thereof; and
outputting the determined Young's modulus or information based on the determined Young's modulus;
wherein the receptacle is electrically and acoustically insulative such that one or more boundaries of the receptacle reflect and contains stress wave therein and induce resonance of vibrations as the uncured concrete mixture therein cures, and the predetermined position of the piezoelectric sensor is within the receptacle.