Mold for manufacturing crack of biological concrete sample and manufacturing method of crack

Abstract

The invention provides a mold for manufacturing a crack of a biological concrete sample and a manufacturing method of the crack, the mold for manufacturing the crack of the biological concrete sample comprises a shell and an insert, the shell is provided with a cavity, the insert is embedded in the cavity and used for forming the crack in the sample, the insert comprises a water-soluble film, and the water-soluble film is arranged in the cavity and used for forming the crack in the sample. The dissolution temperature of the water-soluble film is T1, the pouring temperature of the biological concrete is T2, the sterilization temperature of the mineralized microorganisms in the sample is T3, and the dissolution temperature of the water-soluble film meets the following conditions: T2lt; t1lt; and T3. According to the mold for manufacturing the biological concrete sample crack, the water-soluble thin film is arranged on the insert, when the insert is poured into the sample along with biological concrete, the insert is embedded into the sample, the water-soluble thin film can be dissolved, and a gap is formed between the insert and the sample so that the insert can be taken out conveniently; therefore, a gap matched with the insert is formed in the sample, the gap is clear and standard, the mechanical property is complete, and the requirement of the biological concrete sample can be met.

Description

technical field [0001] The invention relates to the technical field of bio-concrete crack manufacturing, in particular to a mold for manufacturing bio-concrete sample cracks and a crack manufacturing method. Background technique [0002] At present, using raw materials such as bacteria and calcium lactate, bio-concrete with self-healing function can be formulated. However, there are also great differences in the self-healing function of bio-concrete with different ratios, so it is necessary to manufacture cracks of various sizes to measure its self-healing ability. In the research process, how to make cracks of uniform size became a difficult problem. At present, there is no scientific and standardized manufacturing method. In the experiment, the test piece is usually hit to cause cracks, but this method has many defects: [0003] 1. The length, width and depth of cracks created by the impact cannot be controlled; [0004] 2. It is difficult to grasp the impact force. If ...

AI Technical Summary

Problems solved by technology

[0003] 1. The length, width and depth of cracks created by the impact cannot be controlled;

[0004] 2. It is difficult to grasp the impact force. If the force is too small, cracks will not be produced, and if the force is too large, the shape of the sample will be destroyed;

[0005] 3. The experiment is to measure the self-repair ability by testing the mechanical properties of the repaired sample, but impacting the sample will change the mechanical properties of the sample, resulting in data failure and resulting in the failure of the experiment;

[0006] 4. The debris and dust generated by the impact are easily stuck in the cracks, affecting the self-repair function of the sample and the judgment of the staff on its self-repair ability;

[0007] 5. The debris and dust generated by the impact can easily cause damage to the staff and experimental equipment, and pollute the working environment

However, in bio-concrete, the maximum gap repaired by bio-concrete is small, and the gap drilled by the drill bit is difficult to meet the requirements of bio-concrete samples

Images