KR-20260064881-A - Waterproofing agent for concrete base surface and waterproofing method for concrete base surface using thereof

Abstract

According to the present invention, a concrete substrate waterproofing agent is provided comprising a mortar mixture in which rapid-hardening cement, magnesia cement, and artificial silica sand powder are mixed in a volume ratio of 3:2:1; and a penetrating mixture in which 40-60 parts by weight of cyclopropanol, 30-50 parts by weight of isobutylene, 30-50 parts by weight of ethanol, 20-40 parts by weight of 2-bromobutane, 20-40 parts by weight of hydroxyacetic acid, 10-30 parts by weight of acrylonitrile, and 90-110 parts by weight of water are mixed with 100 parts by weight of a silane complex, wherein the mortar mixture and the penetrating mixture are mixed in a volume ratio of 5:10 to 7:10.

Inventors

• 김애자
• 장호연

Assignees

• 김애자
• 장호연

Dates

Publication Date

20260508

Application Date

20241030

Claims (2)

1. A mortar mixture comprising rapid-hardening cement, magnesia cement, and artificial silica sand powder mixed in a volume ratio of 3:2:1; A penetrating mixture comprising 100 parts by weight of a silane complex mixed with 40-60 parts by weight of cyclopropanol, 30-50 parts by weight of isobutylene, 30-50 parts by weight of ethanol, 20-40 parts by weight of 2-bromobutane, 20-40 parts by weight of hydroxyacetic acid, 10-30 parts by weight of acrylonitrile, and 90-110 parts by weight of water, A concrete substrate waterproofing agent characterized by a mixture of a mortar mixture and a penetrating mixture in a volume ratio of 5:10 to 7:10.
2. Includes a concrete substrate waterproofing agent according to Paragraph 1, A step in which pretreatment work is performed on a substrate surface having cracks and waterproof or reinforced areas, and A concrete substrate waterproofing method characterized by including a step in which the above-mentioned concrete substrate waterproofing agent is applied to the surface of the substrate to form a substrate layer.

Description

Waterproofing agent for concrete base surface and waterproofing method for concrete base surface using thereof The present invention relates to a waterproofing agent for concrete substrates and a waterproofing method for concrete substrates using the same. More specifically, the invention relates to a waterproofing agent for concrete substrates and a waterproofing method for concrete substrates using the same, wherein a waterproofing agent comprising a mixture of a mortar mixture and a penetrating mixture is applied to a concrete substrate to improve the physical performance and waterproofing properties of the substrate layer through excellent adhesion and penetration. Generally, the surface of inorganic materials, such as concrete structures, has many micropores. Consequently, when water seeps into the micropores of concrete structures, chloride ions and other substances in the water corrode inorganic materials, and in winter, cracking and aging caused by freeze-thaw cycles are accelerated, leading to a shortened lifespan of the structure. Furthermore, if the aging process accelerates, expansion pressure caused by rebar corrosion, freeze-thaw cycles, and carbonation (neutralization) can result in cross-sectional defects in the floor surface, which poses a risk to safety in terms of aesthetics, structural strength, and functionality. Consequently, there has been a recent increase in efforts to restore safety and functionality by implementing waterproofing to ensure the safety and performance of concrete structures; however, most waterproofing agents for concrete primarily utilize Portland cement-based mortar. Here, conventional waterproofing agents for concrete substrates are, for example, manufactured into mortar by adding CSA (calcium sulfoaluminate) or a latex-based agent and adding a specified fine powder binder. Based on the reaction point of Ettringite, an expansive material obtained from the chemical reaction between cement and water, they are classified into aluminate-based mortars with CA and CA2 as the main component, calcium fluoroaluminate-based mortars with C11A7 and CaF2 as the main component, and sub-primary-based mortars with CSA as the main component, according to the constituent minerals that exhibit rapid hardening properties. However, aluminate-based mortars have the problem that after the hydration reaction, the product transitions into a secondary hydrate that exhibits low strength, making them unstable in the long term and particularly vulnerable to calcium chloride, which can lead to a decrease in durability performance. In addition, while calcium fluoroaluminate-based and sub-primary mortars offer superior performance, they may not be economical due to the need for a separate calcination process and the additional step of grinding into fine powder. In addition, most mortars produced using the alkali-activated substances mentioned above are fast-setting rather than ultra-fast-setting, and since it takes at least one day for strength to develop after mixing with water, they are difficult to apply to emergency construction projects that require rapid construction (e.g., road repair, bridge repair, or construction in water-contacted areas during the winter). For this reason, ultra-fast setting mortars are being manufactured and used by the cement industry using previously developed alumina cement and jet cement to overcome the problem regarding the strength development time of mortars; however, due to the nature of waterproof mortars used in exposure to the external environment, there is a problem in that desired characteristics related to mortar quality, such as durability (freeze-thaw, carbonation, etc.), ambient temperature (drying shrinkage, etc.), compressive strength, and adhesion strength, cannot be obtained. In addition, since most waterproofing agents used for conventional concrete structures are primarily mortar, they fail to penetrate deeply into cracks or pores in the concrete, resulting in reduced adhesion and waterproofing performance. Hereinafter, embodiments of the present invention will be described in detail. First, the concrete substrate waterproofing agent according to an embodiment of the present invention comprises a mortar mixture in which rapid-hardening cement, magnesia cement, and artificial silica sand powder are mixed in a predetermined volume ratio, and a penetrating mixture in which cyclopropanol, isobutylene, ethanol, 2-bromobutane, hydroxyacetic acid, acrylonitrile, and water are mixed in a predetermined weight part of a silane complex, and the mortar mixture and the penetrating mixture are mixed in a predetermined volume ratio. More preferably, the concrete substrate waterproofing agent according to an embodiment of the present invention comprises a mortar mixture in which rapid-hardening cement, magnesia cement, and artificial silica sand powder are mixed in a volume ratio of 3:2:1, and a penetrating mixture in which 40-60 parts by weight of cyclopropan