Advantages of Thick-Layer Self-Leveling Cement Mortar in the Modern Construction Industry
Release Time:
2016-01-25
Source:
Advantages of Thick-Layer Self-Leveling Cement Mortar in the Modern Construction Industry
The rapid development of the architectural decoration industry has led to increasingly stringent requirements for flooring. The persistent cracking and dusting of concrete floors are now unacceptable. As flooring plays an ever-greater role in daily life and industrial operations, more and more clients demand surfaces that combine functional performance with aesthetic appeal. Over time, existing old floors often develop unevenness, hollows, cracks, and dusting—issues that must be addressed when renovating or reconfiguring a floor. Thanks to its ease of application, rapid setting, smooth finished surface, and quick return to service, self-leveling mortar has emerged as a uniquely effective solution for swiftly resolving these flooring challenges.
Self-leveling mortar is a flooring material composed of cement or gypsum binders, fine aggregates, fillers, and additives. When mixed with water (or an emulsion), it exhibits fluidity and can automatically self-level with minimal manual spreading or troweling. It is primarily used in industrial plants, shopping malls, parking garages, and similar applications.
Self-leveling mortar is evolving toward simpler formulations, superior performance, and consistent quality. To achieve this goal, the two primary challenges in its application must first be addressed: unavoidable cracking and insufficient early strength. As self-leveling cement continues to mature and advance, these issues have been systematically resolved, and in response to market demands, Thick-layer self-leveling cement Mortar has become a trend and is being rapidly adopted.
Thick-layer self-leveling cement mortar is applied at thicknesses ranging from 5 mm to 50 mm. It consists of cement-based or gypsum-based binding agents, fine aggregates, fillers, and admixtures, and, when mixed with water (or an emulsion), exhibits flowability that allows it to self-level or, with minimal spreading, achieve a level surface. It is typically used for floor leveling and underfloor heating systems. For residential building floors, the traditional leveling method involves on-site mixing of cement mortar followed by screeding and leveling, particularly in shell-condition units; its main drawback is:
(1) The construction mortar is relatively thick and heavy, imposing a substantial load on the structure; particularly in high-rise buildings, this increased weight directly affects structural safety and the service life of the building.
(2) On-site mixing of mortar generates significant dust, leading to environmental pollution and imposing a high level of physical exertion on construction workers.
(3) Traditional on-site mixed mortar for floor leveling often results in poor overall floor flatness.
(4) For underfloor heating systems—whether electric, hot-water, or gas-fired—the conventional practice of embedding the heating pipes in cast-in-place mortar is problematic. Due to the mortar’s excessive rigidity, thermal expansion and contraction can cause cracking, potentially even pulling apart the heating pipes and leading to leaks. Moreover, this method can result in hollow sounds and cracking in floor tiles, as well as warping of wood flooring.
Underfloor heating is the trend of development, and compared with conventional radiator heating, it offers numerous advantages:
(1) Comfortable, hygienic, and healthy;
(2) Saves space and enhances the aesthetic appeal of the living space;
(3) High efficiency and energy saving;
(4) Good thermal stability;
(5) Long service life;
(6) Consistent with human heating habits.
The advantages of thick-layer self-leveling cement in site backfilling are unmatched, and it is believed that in the near future, thick-layer self-leveling cement mortar will emerge as a leading solution in underfloor heating backfill projects. The formulation of thick-layer self-leveling mortar must comply with current standards for self-leveling mortars; on this basis, the cement-to-sand ratio should be carefully controlled within an appropriate range to minimize shrinkage and cracking, enhance early strength to ensure rapid drying and hardening, and maintain a 28-day compressive strength of no less than 35 MPa. Thick-layer self-leveling mortar represents a new material required for floor leveling and underfloor heating systems. Developing suitable thick-layer self-leveling mortar in response to market trends offers mortar manufacturers an opportunity to break free from industry constraints and unlock new drivers of economic growth. Expanding into new application areas and investing in the development of new products and technologies are the only viable paths for corporate survival and sustainable growth.
