Instructions for use of U-shaped self-compacting concrete instrument
This method is used to measure the ability of fresh concrete to pass through the steel bar gap and fill the corners of the formwork by itself, and is suitable for the determination of the self-compacting performance of various levels of self-compacting concrete.
The test tool should meet the following requirements;
1. The material used for the U-shaped box should be high-quality stainless steel, the inner surface should be smooth, and the frictional resistance between the concrete and the container should be minimized as much as possible. The assembled filling device should be sturdy, and the flow state of concrete can be observed. Place a grid-type barrier at the center of the filling device,
Type 1 grille is made of 5 Φ10mm smooth steel bars.
Type 2 grille is made of 3 Φ13mm smooth steel bars. According to the shape, size and reinforcement status of the structure, the corresponding obstacles and testing standards can be selected in combination with the self-compacting concrete grade.
2. There is a groove in the center of the filling device, and the partition plate and the openable partition plate can be inserted into it. With the insertion device, the A room and the B room can be separated into two spaces.
3. There should be a container for concrete feeding (about 5L capacity, plastic bucket with handle), a straight scraper or spatula for scraping the top surface of concrete, a steel tape measure accurate to 1mm, and a stopwatch measuring to 0.1S And wet cloth, etc.
The new version of the concrete sample can be prepared in accordance with the relevant regulations in the current national standard "Standard for Test Methods for the Performance of Ordinary Concrete Mixtures" GB50080.
The test method should meet the following requirements:
The filling device should be placed vertically and the top surface should be horizontal.
Insert a partition door into the filling device and install a grid-shaped barrier spacer.
Wipe and moisten the partition doors, partition plates, and grid barriers on the inner surface of the filling container with a damp cloth.
Close the partition door and use the plastic bucket container with the handle to continuously pour the fresh concrete sample into the room A until it is full. Do not use a vibrator or rubber hammer to vibrate.
Scrape the top surface of the concrete with a spatula along the upper edge of the filling container and let it stand for 1 min.
Continuously and quickly pull the door up and the concrete side flows through the grid-shaped barrier to Room B until the flow stops. During this period, the filling device must remain stationary and must not move.
In chamber B of the filled container, start from the lower end of the filled concrete, measure the height of the filled concrete to its top surface with a steel tape measure, which should be accurate to 1mm. This height is the filling height expressed in Bh (mm), and the measurement should be along the container In the width direction, take the average of the filling heights at the ends and the center of the three positions.
Calculate the average value of the measured filling height Bh (mm) at the three positions, and the result is corrected to one decimal place, and the report is expressed as an integer value.
The inspection report shall include the following items:
Concrete mix ratio
Types of grille barriers
Filling height Bh (mm)
Product quality commitment:
1. The manufacturing and testing of products have quality records and testing data.
2. For product performance testing, we sincerely invite users to personally inspect the whole process and performance of the product. After the product is confirmed to be qualified, it will be packed and shipped.
Product price commitment:
1. In order to ensure the high reliability and advancement of the product, the selection of the system is made of domestic high-quality products.
2. Under the same competitive conditions, our company will sincerely provide you with preferential prices on the basis of not reducing product technical performance or changing product components.
Delivery time commitment:
1. Product delivery time: try to meet user requirements. If there are special requirements and need to be completed in advance, our company can specially organize production and installation, and strive to meet user needs.
2. When the product is delivered, our company provides the following documents to the user;
â‘ Technical maintenance manual â‘¡Outsourcing parts manual and manufacturer â‘¢Provide a list of vulnerable parts and spare parts, and include a certain amount of spare parts
After-sales service commitment:
1. Service tenet: fast, decisive, accurate, thoughtful and thorough
2. Service goal: service quality wins customer satisfaction
3. Service efficiency: if the equipment appears during or outside the warranty period
Cangzhou Hengsheng Weiye Highway Instrument Co., Ltd. is currently a key backbone enterprise in the production of highway test instruments and construction test instruments in my country. Has a high reputation in our country, the company has guaranteed equipment, perfect testing methods, and strong technical force. Products are designed and produced in strict accordance with national standards. In addition to the supply of test equipment, our factory also undertakes the planning and design of the new laboratory, equipment selection, installation and commissioning, spare parts supply and logistics support.
The company's main products are: asphalt testing equipment, cement testing equipment, geotechnical testing equipment testing equipment, maintenance boxes, maintenance rooms, waterproof coiled material equipment, construction equipment, steel connecting sleeves, and so on. Cement fineness negative pressure sieve analyzer, concrete accelerated curing box, cement rapid curing box, asphalt softening point, asphalt penetration, asphalt viscometer, Marshall stability, Marshall electric compactor, asphalt elongation meter, asphalt content determination Instrument, etc.; concrete series: concrete drilling core machine, mixer, magnetic vibrating table, slicer, smoothing machine, electric steel bar gauge, etc.; geotechnical instrument series: eight-wheel flatness instrument, direct shear instrument, touch Detector, etc.; as well as cement mortar instrument series, curing box, curing room equipment, waterproof coiled material instrument, non-destructive testing instrument, mold trial and other instruments. These products are widely used in universities, municipalities, highways, railways, tunnels, bridges, petrochemicals, water conservancy construction, mixing companies and other fields. The factory provides you with reasonable prices, enthusiastic service attitudes, and superb after-sales guarantees. service.
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