Condensation control type repair mortar for prefabricated parts and preparation method of solidification control type repair mortar

Abstract

The invention discloses a set-control type repair mortar for a prefabricated part and a preparation method thereof. The set-control type repair mortar is characterized by comprising the following components in parts by mass: 10-15 parts of ordinary cement; 30 to 35 parts of special cement; 5-8 parts of gypsum; 30 to 45 parts of sand; 1-2 parts of a water reducing agent; 1-4 parts of a thickening time control agent; 0.5 to 2 parts of a defoaming agent; 0.5-2 parts of a penetrant; the special cement is one or a mixture of sulphoaluminate cement and aluminate cement, and the thickening time control agent is a mixture of lithium silicate, silica sol and bauxite. The thickening time control agent is prepared through high-speed stirring, and then the repairing mortar is prepared through mixing. The prepared repairing mortar is adjustable in setting time, high in early strength and high in bonding strength, and can meet the repairing requirements of the fabricated prefabricated parts.

Description

technical field [0001] The invention relates to a building material, in particular to a mortar for repairing damaged parts of prefabricated components, especially a prefabricated component repairing mortar capable of adjusting setting time and a preparation method thereof. Background technique [0002] With the development of construction industrialization technology, the prefabricated building structure ushered in a period of opportunity for development in our country. Compared with traditional cast-in-place building structures, the use of prefabricated building structures can not only shorten the construction period, improve building quality, but also reduce labor costs, save resources, energy, and reduce pollution. Therefore, this technology will be used in the future urban construction field Will have broad development prospects. [0003] Prefabricated buildings are assembled from various prefabricated components. During the process of manufacturing prefabricated compon...

AI Technical Summary

Problems solved by technology

Although polymer repair materials have the advantage of shorter curing time, their compatibility with small local damage is not very good, and the material cost is relatively high

However, the repair mortar using Portland cement as the main material needs to wait for a long time to develop strength after repair, which cannot meet the requirements of rapid construction turnover and prolongs the time for repairing the construction sequence.

Although the curing time can be shortened to a certain extent by adding water reducing agent and early strength agent, it is difficult to control the setting speed, and the setting time is too fast or too slow, which cannot meet the requirements of construction time