Hebei Bridge Engineering Case: Waterproof Rock Wool Blankets Selected by Hebei Xinmian Building Materials Co., Ltd.

Hebei Bridge Construction Case: Xinmian Waterproof Rock Wool Blankets Ensure Zero Freeze Damage During Winter Construction In December 2024, a river-crossing bridge project in Hebei faced the challenge of winter construction: the bridge's foundation had to be cured in temperatures ranging from -10℃ to -5℃，where improper insulation could lead to concrete cracking. Additionally, the project had to cope with rainy and snowy weather in an outdoor environment. The project ultimately chose the waterproof rock wool blankets from Hebei Xinmian Building Materials Co., Ltd., achieving zero freeze damage during winter construction and successfully completing the curing task.

I. Engineering Challenges and Solutions

1. Challenge 1: Low temperatures + rain and snow, dual need for insulation and waterproofing：

• Traditional Solution: Standard rock wool blanket + plastic tarpaulin, the plastic tarpaulin is easily damaged by wind, and once rain or snow seep through, the rock wool blanket gets damp, causing a decrease in thermal insulation performance of over 50%.

• Hebei Xinmian Building Materials Co., Ltd.The solution employs a 5cm thick waterproof rock wool blanket (core density of 120kg/m³, with a 0.3mm waterproof film on the outer layer), eliminating the need for additional waterproofing fabric. It directly adheres to the foundation surface, meeting both thermal insulation and waterproofing requirements.

• Hebei Xinmian Building Materials Co., Ltd.Customized waterproof rock wool blankets in various sizes such as 1.2m x 3m and 1.5m x 2.5m, with elastic strap edges for a tight fit around the foundation corners, ensuring no heat leakage.

• Equipped with professional installation guidance, two workers completed the 500㎡ foundation cover in just three hours, saving two hours compared to the traditional method.

II. Engineering Effectiveness and Customer Feedback

1. Temperature stable, no frost damageThrough real-time monitoring with a temperature gauge, after covering the foundation with waterproof rock wool, the internal temperature remained stable at 18-22°C. Even with two snowfalls (totaling 15mm of snowfall), the temperature did not drop below 15°C. After the curing process was completed, the concrete met the required strength standards without any signs of frost cracks or hollowing.

2. Cost-Saving, RepurposingThis batch of waterproof rock wool blankets, after completion of the bridge pier maintenance, were inspected and found to be free of damage and leakage. Subsequently, they were used for bridge pier insulation, with a cumulative reuse of 6 times, saving approximately 12,000 yuan in procurement costs compared to single-use rock wool blankets.

3. Customer Reviews：“Hebei Xinmian Building Materials Co., Ltd.Our waterproof rock wool products not only offer superior water resistance but also exceed expectations in insulation, helping us tackle the major challenge of winter bridge maintenance. We will definitely choose their products for the next project." — Mr. Wang, the project manager.

This case fully demonstrates that Hebei Xinnian Building Materials Co., Ltd.'s waterproof rock wool can effectively handle complex engineering scenarios such as outdoor and low-temperature conditions, serving as a reliable guarantee for engineering quality.