一、Product Introduction

Ultra high performance concrete premix (UHPC) is a cement-based composite material made from cement as a binder, combined with various aggregates, additives, etc. It is a hydraulic cementitious material with characteristics such as durability, impermeability, waterproofing, and high strength. According to the construction method, it can be divided into pouring premix (UHPC), self compacting premix (UHPC), and spraying premix (UHPSC). Its spray premix is independently developed by Hunan Renjian Baogu High tech Development Co., Ltd. from the perspective of social development and technological progress, and has completely independent intellectual property rights.

二、Main features

The outer protective layer used for steel structures of offshore oil platforms can significantly improve the service life of components in water level fluctuation zones;

High early strength, with a compressive strength of 35MPa after 24 hours, ≥ 150MPa after 28 days, and a flexural strength of 18MPa;

Good adhesion, 28d ≥ 2.0MPa;

Strong adhesion with steel components and firm bonding with old concrete. Wide adaptability, non-toxic and harmless, environmentally friendly products;

Good durability, waterproof, anti-corrosion, anti-seepage, water increasing, and drag reducing. No aging, no rust on steel components, durable and sturdy;

Good impact resistance, can be used for protective structures in national defense engineering, and can also be used for special structures that require high load-bearing capacity;

High density and good workability. The surface in contact with the template has a high degree of smoothness and is free from harmful external media

Difficult to invade, can be directly used as exterior decoration for buildings.

三、Technical Parameter

item		Performance index
		I	II	III	Ⅳ
Setting time （min）	Initial set	≥45	≥45	≥45	≥45
	Final set	≤600	≤600	≤600	≤600
Compressive strength （MPa）	24h	≥15	≥25	≥35	≥40
	3d	≥40	≥50	≥60	≥80
	28d	≥100	≥120	≥140	≥160
Flexural strength （MPa）	28d	≥12	≥14	≥18	≥22
Bond strength （MPa）	28d	≥2	≥2	≥2	≥2
impermeability	28d	P10	P12	P14	P16

四、Application scope

◎ Used to reduce the size of structural components, increase the usable area and space. Building bridges with longer spans and greater clearances;

The outer protective layer used for steel structures of offshore oil platforms can significantly improve the service life of components in water level fluctuation zones;

Manufacturing integrated containers for storing low to medium level radioactive nuclear waste;

Used in the military and security fields to manufacture anti explosion and anti impact devices;

Structural maintenance and reinforcement of buildings, bridges, tunnels, and docks;

Processing and manufacturing of various building external cladding panels, decorations, bridge or public building external cladding special-shaped panels.

五、Usage and application

Surface treatment: Clean the foundation surface and ensure that there are no debris such as crushed stones, floating slurry, dust, oil stains, and release agents. Apply and spray special interface agent on the foundation surface before construction;

Determine the construction method: Based on the actual situation of the construction, manual injection or spraying methods can be used. Spray (UHPC) dry mix has good thixotropic properties and can be manually sprayed or sprayed with intelligent robotic arms;

Slurry mixing: Add clean water in a clean container according to a material to water ratio of 100:8-10, then slowly add the dry mixture and stir with a forced mixer until a uniform and good mixture is obtained. Avoid excessive dilution, as it may affect the workability. Do not prepare too much material at once, and use it up within 45 minutes;

Construction: using manual pouring or mechanical pouring for construction;

Maintenance: After initial setting, spray water to moisturize and maintain, or use spray special maintenance agents or film coating maintenance;

Under normal storage conditions, the storage period is 90 days. If it exceeds 90 days, it must be verified through testing before use.