Case Study of Protective Renovation Coating Project in Renmin South Historical and Cultural Block, Guangzhou

Renmin South Historical and Cultural Block Protection Center Area Appearance Improvement Project

I. Project Overview
● Project Name : Protective Restoration and Landscape Coordination Project of Renmin South Historical and Cultural Block (Conservation Center and Surrounding Streets)
● Project Location : Core section of Renmin South Road, Liwan District, Guangzhou City, Guangdong Province, just one street away from Guangzhou Cultural Park.
● Construction Units : Guangzhou Liwan District Housing and Urban-Rural Development Bureau, Renmin South Historical and Cultural Block Protection Center
● Scope of renovation : Protection center main building, surrounding arcade facades, street and alley walls, and exterior walls of several historical buildings.
● Completion time : Phased completion in 2023-2024
● Design Concept : Strictly adhering to the principles of "restoring the old as it was, minimal intervention, and harmonious style," a beige microcrystalline stone system was selected to accurately reproduce the classic "yellow sandstone" texture of the old Xiguan arcade buildings and Republican-era architecture.
● Paint supplier : Guangdong Yongrong New Building Materials Co., Ltd. (direct supply from the source)
This project uses our company's Radiant Magic Art Stone Microcrystalline Stone series , which retains the texture of traditional granite and red brick while achieving modern environmental protection, durability and self-cleaning performance requirements. It has become another exemplary project for the protective restoration of Guangzhou's historical and cultural blocks.

II. Material Combination Scheme (Yongrong Beige Microcrystalline Stone Classic Xiguan System)
Core Product: Radiant Magical Art Stone YR-9802-07 (Microcrystalline Stone Series)
1.Main color
○ Beige microcrystalline stone (Old Xiguan Yellow) YR-9802-07-MY
○ It uses a specially selected beige and light gray colored sand blend, which looks warm and elegant from a distance, and the particles appear naturally vibrant up close.
2.Layered matching
○ Large areas of walls and arcade columns: microcrystalline stone as the main material, presenting the solid feel of old yellow sandstone.
○ Footplates, window frames, and moldings: Apply a thicker layer of the same color to enhance the three-dimensional effect and wear resistance.
○ In areas with granite texture: the original granite is preserved, and microcrystalline stone is used only for a smooth transition to maintain a harmonious appearance.
3.Reasons for choosing
○ The beige main color scheme harmonizes perfectly with the existing exposed brick and flagstone slabs of the street, forming a unified yet layered classic Xiguan color scheme.
○ The microcrystalline stone composite process, combining natural colored sand and rock chips, retains the granular texture of traditional stone while possessing modern self-cleaning and weather-resistant properties.

III. Detailed Explanation of Construction Techniques (Nine Techniques for the Renovation of Yongrong Historical District)
1.Treatment of underlying defects: removal of loose layers, repair of cracks, and local reinforcement with rebar.
2.Crack resistance enhancement: Alkali-resistant mesh cloth + polymer mortar full application (preserving the original wall's slightly uneven texture).
3.Anti-alkali sealing primer: Apply one coat by roller to completely seal the efflorescence on old walls.
4.Flexible putty leveling: Apply two thin coats, sand until the thickness is ≤3mm with a 2-meter straightedge.
5.Microcrystalline stone intermediate coat: Spray/apply one coat of beige intermediate coat to unify the base color.
6.Microcrystalline stone main material: Apply in 2-3 coats using a dedicated airless spray gun or stainless steel trowel (total thickness 2.5-3.5mm), then manually roughen or lightly scrape to create a natural sandstone texture.
7.Partial manual trimming: Ensure no joints or drips, and uniform particle distribution.
8.Breathable silicone acrylic topcoat: Apply 1-2 coats to retain the stone texture while improving stain resistance.
9.Finished product maintenance: 7-14 days of natural curing, during which time rainwater should be strictly prohibited.
The entire process employs low-pressure spraying and manual finishing techniques to maximize the restoration of the warm and smooth feel of the old Xiguan hand-cut artificial stone and sand-pulled walls.

IV. Panoramic View Display
● The beige microcrystalline stone exhibits a soft "old Guangzhou yellow" texture under sunlight, blending seamlessly with the surrounding red brick arcades and cobblestone streets.
● From a distance, the wall appears to be constructed of yellow sandstone from the last century; up close, the colored sand particles appear to jump naturally, creating rich details without being overly ostentatious.
● The self-cleaning effect after rain is remarkable, keeping the walls clean year-round and completely eliminating the problems of traditional exterior wall paint turning black and accumulating dust.
● The renovated neighborhood is quiet and elegant; walking through it feels like stepping back into the Xiguan commercial street of the 1950s.
● Having withstood the test of Guangzhou's high temperatures, high humidity, and typhoon season for over two years, the color remains as vibrant as ever, with no powdering or cracking, earning high praise from the neighborhood conservation center and the public.

V. Core Advantages of Source Manufacturers
● Having a deep understanding of the protection requirements for historical and cultural blocks in Guangzhou, and being familiar with the color matching and construction standards for "restoring the old as it was"
● Microcrystalline stone was specially developed for the beige and granite styles of old Xiguan, with particle size distribution and color tone that are highly compatible with traditional architecture.
● Specifically formulated to address the high alkalinity, high salt content, and dampness of old walls, this product features a customized anti-efflorescence and anti-yellowing formula, resulting in superior adhesion and durability.
● The entire system is self-produced and self-sold, ensuring extremely high color consistency across primer, intermediate coat, main material, and topcoat.
● With extensive experience in the restoration of historical and cultural blocks, we maintain long-term cooperation with multiple cultural relics protection units in Guangzhou.
● We provide a full range of services from scheme design, sample confirmation, construction guidance to after-sales maintenance.