Measurement device and measurement method for fresh mortar non-lateral-confinement bearing capacity

Abstract

The invention relates to a measurement device for fresh mortar non-lateral-confinement bearing capacity. The measurement device comprises a frame body, a loading device and a vertical displacement measurement device which are arranged from bottom to top respectively, wherein the frame body comprises a base, as well as a screw rod and a plurality of nuts for mounting the loading device and the vertical displacement measurement device, the loading device comprises a loading barrel, a loading plate is arranged on the bottom surface of the loading barrel, a loading barrel upper cover is arranged at the top of the loading barrel, a test sample is arranged between the loading plate and the base, and the vertical displacement measurement device comprises a screw rod fixing cross beam, a dial gauge mounting beam and a dial gauge. The device can be used for utilizing the dead load of liquid to load, and can load continuously and eliminate load unevenness, and the measurement device is simple in structure and convenient in use, and can easily measure the bearing capacity and displacement change of fresh mortar in a corresponding loading direction.

Description

technical field [0001] The invention belongs to the field of performance testing devices for building materials, and in particular relates to a device for measuring the unconfined bearing capacity of freshly mixed mortar, and also relates to a corresponding measuring method. Background technique [0002] The load-bearing performance of fresh mortar before curing is generally not concerned. However, with the refinement of the research on the characteristics of mortar, and the specialization of the application field of mortar. For example, for 3D printing mortar, since there is no template, the requirements for mortar workability are no longer limited to fluidity, consistency, and setting time. The bearing capacity of freshly mixed mortar and the change of bearing capacity with hydration time are also used to characterize the printing performance of mortar. An important characteristic, the unconfined bearing capacity of fresh mortar was initially studied. [0003] At present...

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Problems solved by technology

[0004] 1. The shape of the freshly mixed mortar is unstable, and a slight disturbance will also cause a change in shape. Therefore, it is not suitable to use the method of lifting the sample platform, and the method of lowering the loading device can reduce the disturbance;

[0005] 2. The surface of the freshly mixed mortar sample is not smooth enough, and the contact area between the loading plate and the sample is not fixed. After the sample is in place, the position adjustment of the loading device and the experimental process need to observe the contact between the loading plate and the sample at any time;

[0006] 3. The bearing capacity of freshly mixed mortar is small, but the deformation is large

Second, there is a large difference in the order of magnitude of the unconfined carrying capacity of the two

[0009] 1. It is impossible to measure the vertical deformation of the mortar after compression;

[0010] 2. When the weight is placed, it may be eccentric, causing uneven force on the mortar sample;

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