Views: 0 Author: Site Editor Publish Time: 2026-06-15 Origin: Site
Prefabricated rubber roll surfacing has become increasingly common in recent years. It offers stable performance, fast installation, fewer joints, and a long service life, so it is widely used in professional competition venues, primary and secondary school sports fields, and public fitness facilities. But many people overlook one key point: the arrival and entry inspection of the rolls is the first checkpoint that determines later installation quality, sports performance, and field lifespan.
Preparation before site entry is not just unloading and stacking materials. Document verification, appearance inspection, performance sampling, site-environment matching, equipment preparation, storage and maintenance, base rechecking - every step matters. If any part is handled carelessly, problems may appear later. Non-compliant material performance, improper storage deformation, or forced construction under unsuitable conditions can lead to bubbling, cracking, color differences, uneven elasticity, and bonding failure sooner or later. Rework costs money, the field may fail acceptance, and athlete safety cannot be properly protected.
Based on national standards, World Athletics requirements, and practical site experience, the following is a full-process checklist for prefabricated roll material arrival and entry control.
According to national standards, World Athletics certification requirements, and construction practice, preparation before site entry should focus on seven key areas: documents, materials, site, environment, tools, storage, and personnel. More specifically:
1. Document verification: factory qualifications, test reports, and certification documents must all be complete. Competition venues also require an additional check of World Athletics Class certification. Documents must match the physical batch. If the documents are incomplete, the materials should not be allowed on site.
2. Material acceptance: check appearance, dimensions, thickness, color difference, and backing structure one by one. National dimensional tolerances must be strictly followed. Rolls with damage, bubbles, delamination, debonding, or peeling must be rejected.
3. Sampling for testing: take random samples on site, send them to a third-party laboratory for physical performance and environmental testing, and keep retained samples for future reference.
4. Base rechecking: before material entry, recheck the base for flatness, slope, moisture content, and strength. If the base is not qualified, the rolls should not be accepted, and they must not be installed.
5. Environmental control: temperature, humidity, sunlight, and wind speed all have clear limits. The rolls should arrive in advance and be left to acclimatize to the site environment; otherwise, thermal expansion and contraction can cause problems.
6. Tools and auxiliary materials: measuring equipment should be calibrated in advance, special tools should be complete, and adhesives and auxiliary materials should be accepted by batch. Do not mix and match unknown or unrelated brands.
7. Storage and transfer: set up a dedicated storage area, control stacking method and height, prohibit dragging, sun exposure, and soaking, and keep a clear batch ledger.
2. First Checkpoint: Document Verification, the Basis of Compliance
Document verification is the first action after material arrival, and it is also the key basis for later acceptance and accountability. The principle is simple: all original documents must be traceable, and batch information must match.
For each batch of roll material entering the site, the supplier must provide the factory certificate, batch inspection report, type inspection report, Chinese instruction manual, and environmental declaration.
The reports should cover two major areas: physical performance, including tensile strength, tear strength, shock absorption, and vertical deformation; and hazardous-substance limits, including heavy metals, TVOC, polycyclic aromatic hydrocarbons, phthalates, and related items. National standards set mandatory requirements for these indicators. School fields must also meet the environmental requirements of GB 36246-2018, Synthetic Materials Surfacing for Sports Areas in Primary and Secondary Schools.
For venues applying for World Athletics certification or hosting provincial-level or higher events, a valid World Athletics certification document must be requested. Core dynamic indicators such as shock absorption (35% to 50%) and vertical deformation (0.6 to 2.5 mm) must be checked, and these indicators should remain stable across the full temperature range of 10 degrees C to 40 degrees C.
The production batch, production date, specification, and model shown in the documents must be fully consistent with the labels on the roll packaging and roll body. Materials from different batches should be filed separately and must not be mixed. Otherwise, color differences and performance differences will eventually become visible.
Once the documents are confirmed, physical acceptance should be carried out roll by roll and batch by batch. The inspection is divided into three parts: appearance, dimensions and thickness, and structure. The tools should include calibrated steel tape measures and digital micrometers.
The roll surface should have uniform texture and consistent color. There should be no bubbles, cracks, pinholes, scratches, wrinkles, or foreign matter. Edges should be straight and neat, with no burrs, splits, delamination, or curling. The backing adhesive or base layer should be complete, without oxidation, debonding, or contamination.
Scratches with a depth of less than 0.5 mm may be repaired on site. However, any bubbles, delamination, or large-area damage should be judged as non-compliant and replaced or returned. For rolls used on the same field, the color difference should be Delta E <= 1.5, with no obvious visible difference.
Width and length: for each roll, remeasure three positions - left, middle, and right. The allowable error should be <= +/-2 mm. Track lane width and curve radius should also be checked against the field drawings to ensure that lane dimensions comply with athletics competition rules after installation.
Thickness: check five positions, including the four corners and the center of the roll. The national standard allows a deviation of +/-0.5 mm. For example, for a roll with a design thickness of 13 mm, the average thickness should be >= 13 mm. No single point should be less than 10 mm, and the area with thickness below 12.5 mm (13 minus 0.5) should not exceed 10% of the total area.
When prefabricated rolls arrive, check the installation direction. For multi-layer composite rolls, inspect interlayer bonding and make sure there is no delamination or hollowing.
According to GB/T 14833-2020, incoming materials must be sampled under witness. Samples are divided into test samples and retained samples.
Under the witness of the owner, contractor, and supervisor, randomly select one roll from the same batch and cut the sample 2 meters away from the roll end. For routine sampling, cut no fewer than three 500 mm x 500 mm specimens: one for testing and two for retention.
Physical performance: tensile strength >= 5.0 MPa (for completed field testing after installation, the national standard requires >= 0.5 MPa), tear strength, and coefficient of friction >= 0.5.
Dynamic sports performance: shock absorption and vertical deformation.
Environmental indicators: heavy metals, VOCs, and related items.
Competition venues also require additional World Athletics-specific dynamic performance tests.
Seal samples in polyethylene bags and label them with project name, sampling date, batch number, and sampler. Store them in a cool, dry place. The retained sample period is 6 months for possible retesting and traceability. Formal installation can begin only after the third-party test report confirms compliance.
Prefabricated rolls depend strongly on the base. Roll arrival does not mean installation can start immediately. The base condition must be rechecked before or after material arrival. If it is not qualified, installation must not proceed.
The base may be asphalt or cement concrete:
Flatness: measured with a 3-meter straightedge, error <= 3 mm.
Longitudinal slope: <= 0.1%.
Transverse drainage slope: <= 1.0%.
Compressive strength of cement concrete base: >= C30.
Compressive strength of asphalt base: >= 1.5 MPa.
The base surface must be free of oil stains, sharp protrusions, loose sanding, and large cracks. The moisture content across the whole field should be <= 5%. A 24-hour full-cover plastic film test can be used; no damp marks or moisture return means it is qualified. Cracks should be repaired in advance with epoxy resin and quartz sand, and deep cracks should also be treated with elastic sealing strips.
A full base cleaning should be completed at the same time as material entry. Dust, sand, stones, and construction debris must all be removed to prevent hard particles from lifting the rolls and causing local bulges or damage.
Prefabricated rubber rolls have obvious thermal expansion and contraction characteristics and are greatly affected by temperature, humidity, and sunlight. Acclimatization after arrival and the installation environment must be strictly controlled.
Suitable ambient temperature: 10 degrees C to 40 degrees C, with 20 degrees C to 30 degrees C being optimal. Relative air humidity should be <= 85%. If the temperature is below 5 degrees C, above 35 degrees C, or humidity is too high, roll unfolding and installation should be suspended. For high-quality fields, control requirements should be raised to 10 degrees C to 30 degrees C.
The rolls should arrive at least 24 hours in advance and be laid flat under the same environment as the construction site. The purpose is to align the roll temperature and deformation with the site environment and release internal stress caused by transport and storage. Otherwise, thermal expansion and contraction after installation can easily lead to edge lifting and joint cracking.
During storage and acclimatization, long-term direct sunlight is strictly prohibited to prevent aging, fading, and hardening of the rolls. When the wind speed on an outdoor site exceeds 5 m/s, roll unfolding should stop to prevent the rolls from shifting or collecting dust.
7. Sixth Checkpoint: Tools and Auxiliary Materials Should Be Ready in Advance
During the entry stage, construction tools and supporting auxiliary materials should be prepared and calibrated at the same time. Do not wait until use to find that tools are unsuitable or auxiliary materials are non-compliant.
All measuring tools, including steel tape measures, micrometers, temperature and humidity meters, and tensile testers, should be sent to the metrology department for calibration in advance and marked with valid calibration labels. Dedicated roll pulley supports, cutting tools, hot-air welding equipment, rolling drums, and notched scrapers should be prepared. Consumables such as hot-air gun nozzles and blades should also be stocked.
Special attention: never drag rolls manually. Edge damage and surface scratches often come from this practice.
Prefabricated rolls must use the original manufacturer's matching adhesive. Adhesives from different brands must not be mixed. Adhesives should arrive with the rolls for acceptance, with mixing ratio and shelf life checked, and should be matured before use in a 15 degrees C to 25 degrees C environment. Sealants, seam tapes, and other auxiliary materials should also be checked by batch.
Storage after arrival and transfer within the site are the final line of defense for protecting roll integrity.
Set up a dedicated storage area that is rainproof, sunproof, and ventilated, with the ground raised at least 20 cm. Rolls should be stacked flat. Standing or leaning storage is prohibited because it can cause local deformation. No more than five rolls should be stacked, and total stacking height should preferably not exceed 1 meter. The bottom rolls must be leveled with pallets or boards to prevent permanent deformation under heavy pressure. Different batches and specifications should be stored in separate zones with signs showing batch number, arrival date, and intended use area.
Use dedicated supports for on-site transfer. Handle rolls gently, and strictly prohibit throwing, dragging, or stepping on them. Cutting should be carried out on a dedicated workbench to avoid cutting directly on the ground and scratching the surface.
Establish a complete material ledger recording arrival time, batch number, quantity, acceptance result, sampling status, storage location, and issue records. This ensures full-process traceability and meets supervision, audit, and later maintenance requirements.
Preparation for prefabricated roll material arrival is a systematic process covering documents, materials, site, environment, tools, and storage. It is also the first gate for the quality of a sports surface. World Athletics standards and national standards set clear mandatory requirements for material performance, testing, and construction environment. Neglecting any link can create hidden risks for quality, safety, and acceptance.
Incomplete documents or non-compliant performance can prevent the field from passing certification and acceptance. Improper storage or unsuitable environmental conditions can cause roll deformation and cracking. Failure to recheck the base or calibrate tools can reduce installation accuracy and service life.
For contractors, supervisors, and project owners, the incoming material acceptance process must be strictly implemented, and three bottom lines must be maintained: materials with non-compliant documents must not enter the site; non-compliant physical materials must not be used; and construction must not proceed when environmental conditions are not qualified.
High-standard preparation not only reduces rework and controls cost, but also allows prefabricated rolls to deliver stable sports performance and helps create an athletics field that truly meets competition standards and remains safe and durable.
A: No. According to the requirements, rolls should arrive at least 24 hours in advance and be laid flat under the construction-site environment to release transport stress and align their temperature with the field environment. If they are installed directly, temperature differences and deformation may cause edge lifting, wider seams, and local bubbling. This is especially obvious in areas with large day-night temperature differences.
A: It is not recommended, and regular projects strictly prohibit batch mixing. Different batches may have slight differences in raw material ratio and production process, which can lead to visible color differences and inconsistent elasticity, affecting both appearance and competition fairness. World Athletics-certified fields and standardized school fields clearly require the whole field to use the same batch. Only emergency small-area repair may be treated as an exception.
A: It depends. If the scratch depth is less than 0.5 mm and the affected area is small, it can be repaired on site with the manufacturer's matching repair agent. After repair, appearance and friction coefficient should be retested, and the roll can be used if it meets the standard. However, if the scratch depth exceeds the limit, or if there are through cracks, bubbles, interlayer debonding, or edge delamination, it is a structural defect and the material must be replaced. It should not be downgraded for use.
A: It depends on the tolerance allowed by the national standard. If the single-point deviation is within +/-0.5 mm, the total area of thinner zones does not exceed 10%, and dynamic performance such as shock absorption and vertical deformation meets the standard, the material can be used normally. But if the thickness deviation exceeds the limit, or thinner areas are concentrated in high-stress zones such as the start area or hurdle area, wear resistance and cushioning will be reduced, and the supplier should replace the material.
A: Transfer them immediately to a rainproof and ventilated indoor area or temporary rain shelter, with the ground raised more than 20 cm. Do not allow ground water to soak the rolls. Outdoor stacking and rain soaking are prohibited. Damp rolls should be naturally shade-dried in a ventilated environment at 20 degrees C to 30 degrees C. Direct sunlight and high-temperature baking are strictly prohibited, as they can cause material aging, shrinkage, and deformation. After drying, recheck moisture content and appearance; only qualified rolls may be used.
A: It is not recommended. If the base moisture content is greater than 5%, even if the rolls are left to acclimatize, moisture vapor will be trapped after installation and migrate upward, causing large-area bubbling and debonding. The correct approach is to ventilate and dry the base first, retest the moisture content until it meets the requirement, and then unfold, acclimatize, and install the rolls. The rolls may be stored properly first, but they should not be laid on a damp base in advance.
A: The difference is clear. Ordinary school and community fields focus mainly on national-standard environmental performance and basic physical properties. For fields hosting athletics events at various levels or applying for World Athletics certification, valid World Athletics certificates must be verified in addition to national-standard items. Extra dynamic indicators such as shock absorption, vertical deformation, and full-temperature-range performance must be tested. Sampling standards are stricter, and document retention requirements are higher.
