Cement base material anticracking testing device and testing method thereof

Abstract

The invention provides a kind of cement base material to anticipate anti-crack performance test to equip and its test method, try device to include to transform to respond device and meet an emergency instrument and calculator, say of transform to respond to equip to establish a contingency slice up, the contingency slice said through lead line and meet an emergency an instrument to connect with each other, the contingency instrument said through lead line and calculator to connect with each other. Should equip test the method create and stick and have a contingency slice and transform and respond device first, then at say of transform and respond equip of inside wreath, outside wreath and scale board sprinkle and note a cement base material and anticipate wreath, dismantle to the outside wreath after protecting, adopt waterproof material and seal completely the last surface that the cement base material anticipates wreath, and places it in the temperature for 20 +-2DEG C and degree of humidity of 20%-70%, then the contingency slice and contingency are connected with each other, the contingency instrument and calculator are connected with each other. It uses the calculator with the detecting software to collect the data transferring from the contingency slice to detect. So the testing device and testing method can detect the cement base material quickly.

Description

technical field [0001] The invention relates to a testing device and testing method for the anti-cracking performance of cement-based materials Background technique [0002] Crack resistance of cement-based materials has increasingly become a hot and difficult issue in the engineering field, especially concrete and mortar with large quantities and wide areas. The cracking of the reinforced concrete floor and the concrete of the side wall of the basement causes water seepage, which greatly affects its function and service life. The cracking phenomenon of wall mortar of new materials (air-entrained concrete blocks, fly ash blocks and small concrete hollow blocks, etc.) causes water seepage on the outer walls of buildings, which affects the normal use of users. However, there is no relatively uniform method for testing the crack resistance of cement-based materials at home and abroad. The quality inspection of commercial concrete and commercial mortar lacks the link of crack ...

AI Technical Summary

Problems solved by technology

There is also a lack of effective test methods for the impact of ex-factory cement on the cracking of cement-based materials in engineering structures

The methods currently used mainly include the plate method and the cracked ring method. The common problems are that the test time is long, the randomness and chance are large, and the weather conditions are greatly affected. The data measured in different regions and seasons are not comparable. Easy to promote and apply

[0003] There are also reports on the research progress of concrete crack resistance testing methods at home and abroad, such as improving the cracking ring, attaching strain gauges to the inside of the inner ring, and deriving the corresponding calculation formula, so that it can monitor the creep of early concrete under constraint conditions. It is not a quick way to test

Another example is the use of the slab method, setting partitions in the two-way restrained frame to induce rapid cracking of the concrete. However, the restraint of the frame to the concrete is provided by bolts connected to the frame, and its reliability is not guaranteed, and the discreteness is relatively large. large; and when the concrete shrinks, due to the uneven constraints, the concrete in the frame is complicated; the number of partitions in this device is at least three, which also reduces the effect of inducing concrete cracks, all of which are constrained The popularization and application of this device in practical engineering

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