Cementitious capillary crystalline waterproof coating

Product Introduction

Cementitious capillary/crystalline waterproofing materials, abbreviated as CCCW, were introduced to Japan, South Korea, and other regions from Europe in 1965. Due to its superior comprehensive performance and cost-effectiveness compared to other types of waterproof materials, this material quickly became one of the mainstream waterproof materials worldwide, occupying a huge market share.

Product Overview

The silicone ions leached from CCCW cementitious capillary crystalline waterproof coating penetrate and diffuse into the concrete along with surface water, reacting chemically with the calcium ions in the concrete to form water-insoluble calcium silicate hydrates (branch-like crystalline structures). These crystalline structures fill the capillary pores and integrate with the concrete, sealing the internal pores and making the concrete denser, thus preventing water leakage. Furthermore, CCCW possesses catalytic properties, enabling it to continuously undergo chemical reactions upon contact with water. The generated crystalline structures continuously grow and fill the internal pores of the concrete. Therefore, even if the concrete structure is partially damaged and leaking, it will undergo crystallization and self-repair upon exposure to water (even for cracks as small as 0.4mm). According to experiments, the crystalline structures generated by CCCW can repair cracks as small as 0.4mm. Therefore, CCCW has the ability to self-repair cracks of this size without the need for additional waterproof layer repairs. CCCW exhibits multiple impermeability and self-repair characteristics and performance, and has strong compressive strength, reaching up to 3.0MPa. The waterproof layer and the concrete surface form a complete system that does not separate, and the material can fully absorb moisture from the concrete surface to participate in its crystallization reaction, preventing hollowing. Due to its breathable yet impermeable characteristics, it can be cured simultaneously with the concrete structure.

Cementitious capillary crystalline waterproofing material is a gray powdered rigid material formulated by using special Portland cement as the base material and incorporating active chemical ingredients. The waterproofing mechanism of cementitious capillary crystalline waterproofing material primarily relies on its porous nature. Under the influence of water, the active chemical substances within the waterproofing material use water as a carrier. As water permeates into the structural pores, the active chemical substances penetrate into the interior along with the water and react to form insoluble crystals such as ettringite. These active chemical substances undergo hydration reactions with unhydrated cement particles, promoting cement hydration, forming cement hydration crystals, generating a large number of crystals, and filling and sealing the pores with these crystals, preventing water from entering the concrete, thus achieving the purpose of waterproofing.