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450×350×120 large‑plate concrete jetting test mold, steel test mold
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- Product Description
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450x350x120 large plate jetting test mold
Dimensions: 450 x 350 x 120 mm
Material: All cast iron, all plastic
In pairsSelf-Verification Procedure for Concrete Test Molds, Self-Verification Procedure for Concrete Test Molds
1. The self‑calibration cycle for concrete test molds is three months.
2. The inner surface of the concrete test mold shall be smooth and free of defects.
3. Measurement of the internal dimensions of concrete test molds
Measure the distance between the inner surfaces of the two opposite side plates of the mold, using a dial caliper to take symmetrical height measurements. Take one measurement at the midpoint of each side with a dial caliper. The dimensions shall comply with the following requirements:
Mold trial dimensions (mm) Side (mm) Diagonal (mm)
Each side (mm) Permissible deviation (mm) Diagonal length (mm) Permissible deviation (mm)
100×100×100 100 0.4 141.4 ±0.55
150×150×150 150 0.5 212.1 ±0.85
200×200×200 200 0.6 282.8 ±1
4. Verticality Measurement
Use a dial caliper to measure the lengths of the two diagonals on the top surface; the permissible deviation is specified in the table above. The perpendicularity between the side panels and the top surface of the base plate shall be checked at the midpoint along the length of the side panel using a straightedge and feeler gauges; the deviation from perpendicularity shall not exceed ±0.45° (equivalent to a gap of 0.75 mm per 100 mm).
5. Flatness Measurement
Use a steel plate ruler and feeler gauges to measure the flatness of the five inner surfaces of the test mold. The deviation shall not exceed 0.05 mm per 100 mm.
6. Testing Instruments:
① Dial caliper (with a resolution of 0.02 mm);
② Right-angle ruler with a blade;
③ Steel plate ruler (accuracy: 1 mm);
④ Feeler gauge (0.02 mm–1 mm).
7. This self-assessment method is based on reference standards.
① “Concrete Test Molds,” Industry Standard of the People’s Republic of China, JG 3019-94;
② “Rules for the Preparation of National Metrological Verification Procedures,” JJG 1002-84.
Reasons to Choose Us
Multiple specifications to choose from
Source factory
Ships promptly
Thoughtful service
Supports customization
Selected Raw Materials
Factory Advantages
Deep expertise, comprehensive product range
√Over 10 years of dedicated R&D and manufacturing of testing instruments for highway, construction, geotechnical, asphalt, cement, and other engineering applications.
√Comprehensive category coverage: from raw material testing to construction quality control, a one-stop solution.
√Compliant with international standards such as ISO and GB, meeting the regulatory requirements of overseas projects.
Reliable quality and excellent value for money.
√ We strictly adhere to the ISO 9001 quality management system, select core components from internationally renowned brands, and conduct full inspection before shipment.
√ In-house manufacturing + a large-scale supply chain deliver strong price competitiveness, with no markups from intermediaries.
√Stable and durable, with a low failure rate, reducing operational and maintenance costs for overseas customers.
Efficient delivery, global service
√In-stock inventory plus flexible manufacturing ensures 7–15 day rapid delivery, with support for customized rush orders.
√Cangzhou’s Lin’gang District boasts a strategic location, with convenient sea and air transportation and globally traceable logistics.
√Multilingual team with 24-hour technical support, offering installation and commissioning, training, a three‑year warranty, and ongoing follow-up services.
Operating with integrity and backed by extensive experience.
√13 years of industry expertise, serving over 30 countries and regions worldwide.
√The principle of “integrity in business, mutual benefit.”
√Deep understanding of international engineering standards and procurement processes, with efficient communication and seamless collaboration.
Frequently Asked Questions
Is the universal materials testing machine experiencing loading stalling or abnormal zeroing of load data?
1. Loading lag: Clean the lead screw and guide rails, apply lubricant, and remove debris from the transmission components. 2. Zeroing anomaly: Restart the equipment system, calibrate the load and displacement zero points, and check for poor electrical contact in the sensor wiring. 3. Overloading is strictly prohibited; before testing, verify that the grips are securely tightened to prevent eccentric loading of the specimen.
How often should in‑instrument verification be performed? Which instruments are required to undergo it?
High‑precision, high‑frequency‑use, and drift‑prone equipment (such as balances, penetration testers, water permeability testers, and sensor‑type devices) shall undergo intermediate verification every three months; routine equipment shall be verified every six months. Equipment that is within the verification/calibration interval, has been repaired following a malfunction, or has been relocated must undergo additional intermediate verification, with complete verification records maintained.
Is the repeatability of pendulum-type pavement friction coefficient measurements poor?
Key points for resolution: Prior to testing, thoroughly clean the pavement at each measurement point, ensuring there is no standing water, dust, or debris; calibrate the instrument’s level and zero point to ensure a standardized pendulum‑drop trajectory; strictly control the pendulum’s sliding distance; avoid conditions such as strong winds, wet pavement, or abrupt temperature changes; and calculate the average of multiple measurements taken at the same point.
How should one handle cases where the pavement infiltration meter data exceeds allowable error limits, exhibits leakage, or shows abnormal readings?
1. Sealing leaks: Inspect the base seal for aging or damage and replace it promptly; before testing, firmly press down on the base to expel any residual air inside. 2. Data deviation > ±2%: Calibrate the level sensor, clean any fouling from the graduated cylinder, and check for damage to the scale markings. 3. Compliance with new regulations: For seepage rates ≤ 300 mL/min, existing equipment may continue to be used; for rates > 300 mL/min, the accuracy of older equipment fails to meet standards, and such equipment must not be used.
Can the old Marshall compaction apparatus and stability tester still be used?
According to the 2025 revised asphalt testing procedures, after adjusting the indenter configuration on the Marshall stability test apparatus, existing instruments currently in use may continue to be operated normally without mandatory replacement; only periodic calibration to maintain accuracy and ensure equipment integrity is required.
What are the causes of uneven compaction and layered cracking in molded specimens during compaction testing?
Main causes: non‑vertical drop of the compaction hammer, rail jamming, excessive deviation in hammer weight, uneven layer thickness during loading, insufficient number of blows, or overload. Solutions: regularly lubricate the guide rails; verify and correct the vertical alignment of the hammer; strictly follow the procedure for layered material placement and step‑by‑step compaction; ensure that hammer weight and drop height comply with standards; and prevent over‑thick layers.
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