Time-varying detecting device and method for concrete rheological parameters

A time-varying detecting method for concrete rheological parameters, comprising the steps of:

• Step 1, providing a double-covered cylindrical container which has top and bottom covers that are allowed to be freely opened and closed, and a lifting frame including a pair of vertical supports each of which is rotatably connected by a connecting member to a side wall of the double-covered cylindrical container, wherein left bracket-shaped slots are formed in central portions of the vertical supports, and wherein each connecting member has an end received in a recess formed in an outer wall of the double-covered cylindrical container and tightly locked by an associated fastener, and a further end inserted in a respective one of the slots;
• wherein the left bracket-shaped slots each comprise a upper horizontal sub-slot, a lower horizontal sub-slot and a vertical sub-slot connecting an end of the upper horizontal sub-slot with an end of the lower horizontal sub-slot;
• Step 2, opening the top cover of the double-covered cylindrical container to form an opening, and filling a prepared concrete mix into the double-covered cylindrical container through the opening;
• Step 3, setting operating parameters for a concrete rheometer and activating the concrete rheometer to detect current static and dynamic rheological parameters of the concrete mix, and then deactivating the concrete rheometer;
• Step 4, tightly closing the top cover of the double-covered cylindrical container and leaving the double-covered cylindrical container until a predetermined period of time expires;
• Step 5, inserting and fixing opposing end portions of the connecting members respectively in the vertical supports and the recesses formed in the outer surface of the double-covered cylindrical container, lifting the double-covered cylindrical container to a predetermined height by raising the connecting members, flipping the double-covered cylindrical container 180°, and lowering the double-covered cylindrical container onto the floor;
• Step 6, opening the bottom cover and re-mixing the concrete mix in the double-covered cylindrical container using a portable vane-type mixer until the concrete mix becomes homogeneous;
• Step 7, repeating step 3 to detect time-varying rheological parameters of the concrete mix;
• and
• Step 8, deactivating the concrete rheometer and ending the process.