Darquennes A,Staquet S,Espion B,et al.Comparison between different techniques for monitoring setting and hardening of concrete[C].Nondestructive testing of materials and structures,2009.
 Trtnik G,Turk G,Kavcic F,et al.Possibilities of using the ultr asonic wave transmission method to estimate initial setting time of cement paste[J].Cement and Concrete Research,2008,38:1336-1342.
 Ghoddousi P,Javid A A S, Sobhani J,et al. A new method to determine initial setting time of cement and concrete using plate test[J].Materials and structures,2016,49:3135-3142.
 Hofmann M P,Nazhat S N,Gbureck U,et al.Real-time of the setting reaction of brushite-forming cement using isothermal differential scanning calorimetry[J]. Journal of biomedical mater ials research part B: applied biomaterials,2006,79B:360-364.
 Reinhardt H W,Grosse C U.Continuous monitoring of setting and hardening of mortar and concrete[J]. Construction and buil ding materials,2004,18:145-154.
 Trtnik G, Gams M. The use of frequency spectrum of ultrasonic P-waves to monitor the setting process of cement pastes[J].Cement and Concrete Research,2013,43:1-11.
 Robeyst N, Gruyaert E, Grosse C U,et al.Monitoring the setting of concrete containing blast-furnace slag by measuring the ultrasonic p-wave velocity[J].Cement and Concrete Research,2008,38:1169-1176.
 Ye G,Lura P,Van Breugel K,et al.Study on the development of the microstructure in cement-based materials by means of numerical simulation and ultrasonic pulse velocity measurement[J].Cement & concrete composites,2004,26:491-497.
 Keskin O K,Yaman I O,Tokyay M.Effects of experimental parameters in monitoring the hydration of cement mortars by ultrasonic testing[C].Nondestructive Testing of Materials and Structures,2013:437-443.
 Grosse C U,Reinhardt H W.New developments in quality control of concrete using ultrasound[C].Nondestructive Testing in Civil Engineering,2003.
 Kamada T,Uchida S,Rokugo K.Non-destructive evaluation of setting and hardening of cement paste based on ultrasonic propagation characteristics[C]. Journal of advanced technology, 2005(3):343-353.
 Lee H K,Lee K M,Kim Y H,et al.Ultrasonic in-situ monito ring of setting process of high-performance concrete[J].Cement and Concrete Research,2004,34(4):631-640.
 Sayer C M,Dahilin A.Propagation of ultrasound through hydrating cement parts at early times. Advanced Cement Based Material,1993(1):12-21.
 Robeyst N,Grosse C U,De Belie N.Factors affecting the mon itoring of the early setting of concrete by ultrasonic P-waves[C]. Nondestructive Testing of Materials and Structures,2013.
 Hwang C L,Shen D H.The effects of blast-furnace slag and fly ash on the hydration of Portland cement[J]. Cement and Concrete Research,1991,21(4):410-425.
 Rapoport J R, Popovics J S,Subramaniam V K,et al.Using ultrasound to monitor stiffening process of concrete with admixtures[J].ACI Materials Journal,2000,97:675-683.
 Keating J,Hannant D J,Hibbert A P.Comparison of shear modulus and pulse velocity techniques to measure the build-up of structure in fresh cement pastes used in oil well cementing[J]. Cement and Concrete Research,1989,19(4):554-566.
 Sayers C M, Grenfell R L.Ultrasonic propagation through hyd rating cements[J].Ultrasonics,1993,31(3):147-153.
 Chotard T,Gimet-Breart N,Smith A,et al.Application of ultra sonic testing to describe the hydration of calcium aluminate cement at the early age[J].Cement and Concrete Research, 2001,31(3):405-412.
 Harker A H,Temple J A G.Velocity and attenuation of ultrasound in suspensions of particles in fluids[J].Journal of Phy sics D:Applied Physics,1988,21:1576-1588.
 Biot M A.Theory of propagation of elastic waves in a fluid-saturated porous solid[J].Acoustical society of America,1956,28:168-191.
 Zhu J,Kee S H,Han D,et al. Effects of air voids on ultrasonic wave propagation in early age cement pastes[J]. Cement and Concrete Research,2011,41:872-881.
 Van N G B der Winden. Ultrasonic measurement for setting control of concrete[M].1991.
 Khokhar M I A,Staquet S,Roziere E.Ultrasonic monitoring of setting of green concrete containing high cement substitution by mineral additions[M].2009.
 Voigt T,Grosse C U,Sun Z,et al.Comparison of ultrasonic wave transmission and reflection measurements with P- and S-waves on early age mortar and concrete[J].Materials and Struc tures,2005,38:729-738.