Case Study of Protective Renovation Coating Project in Xinhepu Historical and Cultural District, Guangzhou

Red Midongshi Landscape Enhancement Project in the Site of the Third National Congress of the Communist Party of China

I. Project Overview
● Project Name : Protective Restoration and Landscape Coordination Project of Xinhepu Historical and Cultural Block (Site of the Third National Congress of the Communist Party of China and Surrounding Courtyards)
● Project Location : Core area of Xinhepu, Dongshan District, Yuexiu District, Guangzhou City, Guangdong Province (surrounding the Memorial Hall of the Third National Congress of the Communist Party of China)
● Construction Unit : Guangzhou Yuexiu District Housing and Urban-Rural Development Bureau
● Scope of renovation : The surrounding wall of the site of the Third National Congress of the Communist Party of China, part of the facade of the memorial hall, the exterior walls and courtyards of several surrounding Republican-era Western-style buildings.
● Completion time : Phased completion in 2023-2024
● Design Concept : Adhering strictly to the principle of "restoring the old as it was" in cultural relic preservation, the design uses a "red travertine + water-coated sand" system to recreate the warm and dignified feel of the red brick travertine from the Republican era, reflecting the solemnity and warmth of revolutionary historical buildings.
● Paint supplier : Guangdong Yongrong New Building Materials Co., Ltd. (direct supply from the source)
This project marks the first large-scale application of the red travertine system to the renovation of areas surrounding national-level cultural relics sites. It not only meets the requirements for cultural relic protection but also achieves comprehensive performance in terms of modern environmental protection, durability, and crack resistance, making it a benchmark case for the renovation of red historical districts in Guangzhou.

II. Material Combination Scheme (Yongrong Red Rice Travertine + Water-Encased Sand Classic System)
Core products:
1.Midong Stone (Tilapia) YR-9802-12
○ Main color: Revolutionary Red Rice Travertine YR-9802-12-RD
○ Applications: Large areas of walls, arches, and columns, showcasing the natural pores and warm texture of Republican-era red brick travertine.
2.Water-in-sand (crown crystal) YR-9802-22
○ Secondary color: Red water-based sand in the same color code
○ Applications: Plinths, window frames, and detailed edging, creating richer transitions between granite layers.
3.Collocation Logic
○ Mi Dongshi is responsible for the large-area "red brick travertine" texture, with natural holes and a warm touch.
○ Water-based sand coating is used for areas requiring a higher degree of stone imitation, resulting in fuller particles and a more three-dimensional appearance from a distance.
○ The two materials, in the same color, blend seamlessly, presenting an overall calm and understated revolutionary red that is both solemn and imbued with historical warmth.

III. Detailed Explanation of Construction Techniques (11 Techniques for the Restoration of Yongrong Cultural Relics)
1.Cultural relic-level basic assessment: A professional team inspected the original wall for defects, and only minimal intervention was performed on localized peeling layers.
2.Crack-resistant reinforcement: implanted stainless steel anchor bars + alkali-resistant mesh + polymer mortar
3.Alkali-resistant sealing primer: Roller-applied low-alkali primer specifically for cultural relics, completely preventing alkali return.
4.Flexible putty thin application: The thickness is controlled at 1-2mm to preserve the original texture of the historical wall.
5.Mid-coat coating for travertine: Apply one coat of red mid-layer travertine to even out the base color.
6.Mitang stone main material: Apply by hand in 2-3 coats (total thickness 3-8mm), and press out natural pores with special tools.
7.Water-based sand texture area: After marking the grid lines, apply two coats of red water-based sand texture using a wet-on-wet spray to create a delicate stone texture.
8.Hand finishing: Lightly sand down any burrs to ensure a natural transition between the travertine and the water-based sand.
9.Breathable topcoat: Apply two coats of breathable topcoat specifically designed for cultural relics, preserving the texture while enhancing stain resistance.
10.Finished product maintenance: Allow to cure naturally for at least 14 days, during which time the product should be covered and protected from rain.
11.The cultural relics department conducted an inspection, comparing each item with historical photographs to ensure that the restoration was done "as it was."
The entire process combines manual scraping with low-pressure spraying to restore the texture of hand-cut and perforated artificial stone from the Republican era to the greatest extent possible.

IV. Panoramic View Display
● The revolutionary red rice travertine, under the sunlight, presents a warm and heavy texture of red brick travertine, blending seamlessly with the original red brick architecture of the site of the Third National Congress of the Communist Party of China.
● The large face features naturally distributed holes, resembling a century-old red brick wall eroded by wind from afar, yet feeling warm and real to the touch up close.
● The water-based sandblasting technique creates a smooth transition between fine grains with distinct layers, perfectly replicating the classic "upper cave stone, lower granite" construction method used in Republican-era Western-style buildings.
● The renovated street is both dignified and warm, allowing visitors to feel the weight of revolutionary history while also being healed by its comforting red fabric.
● Having withstood the test of Guangzhou's high temperatures and humidity, as well as typhoon and rainy seasons for two years, the color remains as good as new, with no sand shedding or cracking, earning unanimous praise from cultural relics departments and tourists.

V. Core Advantages of Source Manufacturers (Why Yongrong Was Chosen as the Site of the Three National Congresses)
● They are well-versed in the standards for the restoration of cultural relics protection units and have extensive experience in collaborating with national-level cultural relics protection units.
● Red Mi Tongue Stone was specially developed for revolutionary historical buildings, and its color and texture are highly coordinated with the red bricks from the Republic of China era.
● The travertine and water-based sandstone are seamlessly integrated in the same color code, truly achieving zero color difference between the large surfaces and details.
● Specifically designed for old walls with high alkali and high salt content, a customized formula is used to prevent efflorescence and yellowing, resulting in enhanced durability.
● The entire system is self-produced and self-sold, ensuring extremely high color consistency across primer, intermediate coat, main material, and topcoat.
● We provide a full range of services, from cultural relic design demonstration and sample sealing to construction guidance and post-construction maintenance.