iTesting is an on-line tool for measuring concrete’s heat of hydration and hydration rate versus its curing age. iQDrums, our concrete calorimeters for heat hydration, use the heat signature method to simulate thermal crack and fast-track construction management. Heat signature -- in combination with simulation – creates a powerful planning tool for optimizing concrete placements. Heat signature helps reduce costs using fast-track construction, provides an argument for value engineering, creates a tool for performance selling of concrete mixes, and aids in troubleshooting.
Alternate curing plans (formwork and insulation types).
Varying concrete placement temperatures.
Weather (air temperature and wind speed) or imposed curing temperatures (precast).
Simulating in-place strength to fast-track or thermal cracking specs.
Simulating in-place setting properties, including criteria for flat-work finishing, saw cutting and slip-forming.
Our unique ‘Heat signature’ is defined as the heat of hydration and the rate of heat released as a function of curing age of a cementitious mixture during hardening (figure to the right). The adiabatic temperature rise (ATR) establishes the maximum possible temperature increase of a concrete mixture when it is perfectly insulated. ATR is a key property used when engineering a concrete mixture for high performance and importantly, for predicting thermal cracking.
Easily measure heat signature profiles using our automatic, web-based iQdrum calorimeter technology. Now in combination with Quadrel iService, develop a database of concrete mixes that include valuable measured properties such as heat of hydration versus curing age, strength versus curing age, and many others. Using this data, accurately performance simulate the database mixes under real field conditions. iQdrum calorimeters use mobile technology. Remote measurements feed into the Quadrel database, so you can view measurement data anywhere.
Heat signature profiles for cementitious mixtures such as combinations of cement, slag, fly ash, and silica fume, and various chemical admixtures provide a great deal of information regarding how these mixtures interact during setting and strength development periods.
Heat signature in combination with simulation makes for a powerful planning tool for optimizing concrete placements, saving costs through fast track construction, value engineering and performance selling of concrete mixes, and trouble shooting.