ABSTRACT

This paper reports a laboratory implementation of a prototype sensor for the measurement of in situ concrete static modulus of elasticity. Sensor measurements for a trial concrete mixture were generated, post-processed, and calibrated to best match companion ASTM C469 modulus of elasticity testing performed on the same mixture for concrete ages up to 28 days. The sensor prototype measurements demonstrated close agreement with ASTM C469 testing with approximately 90% of calibrated sensor prototype measurements within ±5% of companion testing. The initial sensor prototype implementation reported in this study affirms the feasibility of in situ concrete modulus of elasticity measurement and justifies further sensor development and implementation efforts.

摘要

本文报告了用于测量原位混凝土静态弹性模量的原型传感器的实验室实施。生成、后处理和校准试验混凝土混合物的传感器测量值，以最匹配配套的 ASTM C469 弹性模量测试，对相同混合物进行长达 28 天的混凝土老化。传感器原型测量结果与 ASTM C469 测试非常吻合，大约 90% 的校准传感器原型测量值在伴随测试的 ±5% 以内。本研究报告的初始传感器原型实施证实了现场混凝土弹性模量测量的可行性，并证明了进一步的传感器开发和实施工作的合理性。