A statement that silica sand “cools a sports surface” is incomplete unless it identifies the whole surface, measurement and conditions. A lower temperature in one material sample does not establish the temperature of an installed pitch throughout a sporting session.
The UAE Union Atlas documents a hot climate with substantial coastal humidity and different inland conditions.1 That context makes local evaluation relevant, but does not provide a measured cooling benefit for any particular infill.
The proposed framework below helps an operator examine a cooling claim, compare evidence and define an appropriate material enquiry. It distinguishes sand characteristics from a complete cooling system and surface measurements from air conditions.
1. Write the claimed benefit as a testable sentence
Replace “cool sand” with a precise question: compared with which installed reference, under which conditions, does the candidate system show a lower measured surface temperature and for how long?
Name the system components that change. If fibres, shockpad, infill and water management all differ, the outcome belongs to that combination. It cannot be assigned solely to the silica sand.
In the proposed enquiry, ask the claimant to provide the measurement method, site or test apparatus, timing and reference condition. A number without these items is not yet a comparable result.
Keep the intended benefit specific. A surface-temperature difference, reduced irrigation requirement and improved playing characteristics are distinct claims. Each needs its own observation and acceptance criterion rather than sharing one favourable photograph.
2. Separate sand, performance infill and the assembled surface
A sports surface can contain different materials in different roles. Identify where the sand sits, its distribution, applied amount and the rest of the construction. Do not treat a reference to “infill” as though it necessarily describes plain silica sand.
FIFA’s stadium guidance discusses artificial surfaces within a programme of procurement, installation, testing and maintenance.4 For a cooling comparison, retain that system view rather than purchase a grain type based only on an isolated thermal label.
A proposed component test can be useful for screening, but the assembled-surface trial asks another question. A bare tray of sand does not contain the same exposed fibres, shading between components or underlying construction.
For procurement, distinguish a specified sand layer from the complete product configuration. If the approved system uses a particular combination, a change to one component needs the appropriate evaluation before being called equivalent.
3. Compare surface temperature with surface temperature
Surface temperature and air temperature are different quantities. A sensor above the pitch and a measurement of its exposed surface should not be placed in the same comparison column without naming them.
The Penn State study measured both surface temperature and air approximately one metre above the surfaces.2 Its separate measurements illustrate why a reported surface benefit does not automatically describe air at player height.
For the proposed field trial, state the measurement height for air sensors and the measurement location for surface observations. Document which quantity appears in each graph. Keep nearby reference measurements simultaneous where possible.
Avoid transforming a lower surface number into a general health or comfort promise. That wider assessment requires its own relevant evaluation. The material trial can answer a defined thermal question without claiming to measure every aspect of human exposure.
4. Read irrigation results over time
Penn State’s experiments found cooling after irrigation, with the magnitude and persistence dependent on conditions; the full study distinguishes the tested surfaces and irrigation regimes.2 A single immediate post-watering reading does not represent the whole session.
For the proposed comparison, measure before intervention, immediately afterwards and at defined intervals covering the intended use. Retain an untreated reference throughout the same period. Record when additional water is applied.
If a claim specifies a two-hour benefit, show the two-hour record. An initial large reduction followed by rapid rebound supports a different statement from a persistent smaller reduction.
Keep timing explicit in the commercial description. “Lower immediately after watering under these test conditions” and “lower throughout the planned session” require different evidence. Choosing one representative point after seeing the curve can exaggerate the result.
5. Distinguish an engineered evaporative system from dry sand
A 2024 Amsterdam study evaluated an integrated water-storage and capillary-irrigation approach with specific turf configurations.3 That is evidence about a designed system; it is not proof that ordinary dry silica sand reproduces its results.
In the proposed review, identify the source of water, how it reaches the exposed system and which components participate. A product relying on maintained moisture should describe its water-management requirement.
Do not omit additional components when comparing purchase prices. A system result involving storage, capillary elements and a particular infill cannot be costed as a bag of sand alone.
Ask whether a supplier’s evidence concerns the exact configuration offered. If a key component is absent from the proposal, request an explanation and an appropriate trial before retaining the original cooling claim.
6. Keep UAE conditions in the trial rather than in the headline
A test conducted in another climate provides useful research evidence, but does not establish the numerical outcome at a UAE venue. Identify the local conditions relevant to the intended hours of play.
In the proposed programme, record air temperature, humidity, sunlight conditions and wind using appropriate methods. Note shade changes and the surface’s initial moisture state. These records help distinguish a material comparison from a weather change.
Select trial days and times before observing the results. If the intended question concerns an exposed afternoon session, a comparison conducted only in morning shade answers another question.
Use geographically specific measurements when interpreting a venue. Coastal and inland conditions should not be treated as interchangeable solely because both sites are in the UAE. The local trial is more useful than a universal national cooling percentage.
7. Compare simultaneous reference areas
Two surfaces measured on different days can experience different weather. A proposed paired trial uses comparable areas and simultaneous or suitably coordinated observations to reduce that ambiguity.
Keep the construction and maintenance condition comparable except for the variable intentionally tested. If one area is freshly prepared and the other heavily used, note that difference rather than silently attribute the outcome to the sand.
Use repeated locations on each area. The warmest point, coolest point and average represent different summaries. Choose the reporting rule before inspecting the measurements.
If small research plots are used, state their size and arrangement. Their evidence can guide screening, while a full installation introduces other conditions. Keep that progression explicit instead of presenting the screening plot as a completed venue demonstration.
8. Make the temperature difference calculation transparent
In a fictional paired observation, the reference surface measures 60°C and the candidate 55°C at the same stated time. The difference is 5°C. Reporting only “8.3% cooler” is ambiguous because Celsius has a conventional zero and does not provide a general ratio scale for thermal benefit.
Use the absolute difference, the two original temperatures and the conditions. If a percentage appears in a commercial claim, ask precisely how it was calculated and what it is intended to express.
Now suppose the next paired observation is 62°C and 61°C. The difference has narrowed to 1°C. A claim based only on the first observation conceals that change.
Plot or tabulate the time series using the same measurement procedure. The resulting evidence can support a scoped statement about the measured difference without inventing a percentage benefit for every condition.
9. Quantify water use rather than describe it as “a little”
In a fictional application, 1 mm of water over 1 m² equals 1 litre. Applying 2 mm over a 1,000 m² trial area therefore represents 2,000 litres, or 2 m³, if the stated depth is actually delivered over that area.
Three such applications use 6 m³. This arithmetic is not a recommended cooling regime. It shows how a modest-sounding application depth can correspond to a significant operational volume.
For the proposed comparison, measure delivered water and distinguish it from pump output. Water outside the trial area or escaping by another path should not automatically be counted as effective wetting of the evaluated surface.
Report cooling evidence together with the water used. A lower temperature with a higher resource requirement is a different procurement proposition from a similar outcome with less water. Keep both visible before deciding.
10. Preserve playing and drainage requirements
A cooling trial does not remove the need for an appropriate playing surface. FIFA’s guidance connects artificial pitch selection with testing and ongoing maintenance.4 Retain the requirements applicable to the selected sport and system.
In the proposed trial, identify which other checks are needed before acceptance of a modified infill. A favourable thermal result should not silently override an unfavourable playing or drainage result.
Avoid changing the applied sand quantity solely to pursue a temperature difference without the system designer’s evaluation. The modified configuration must still be the one evaluated for the intended use.
Keep the acceptance decision multi-parameter but clear: thermal observation, required surface performance and practical operation. Each result has its own evidence. Combining them in a purchasing decision does not make the measurements interchangeable.
11. Evaluate repeatability and the size of the effect
A single successful reading provides little information about variation. Repeat observations across the conditions defined for the comparison. Include instrument checks and consistent positioning in the trial procedure.
If the measured difference is comparable with the variation between repeated observations, avoid presenting a confident material ranking. Investigate whether the change is distinguishable and practically relevant.
A fictional set of paired differences of 1°C, 0°C and 2°C supports a different interpretation from 6°C, 7°C and 6°C under comparable conditions. These are illustrations of comparison logic, not acceptance thresholds.
Report the spread and the relevant original values. An average alone can hide a period when the intended benefit disappears. If the objective concerns an entire session, the duration of benefit belongs in the decision.
12. Separate the claim review from the supply enquiry
A useful review concludes with a scoped finding: what was measured, in which configuration and conditions, compared with what reference, and over which duration. A claim unsupported by the supplied evidence should be narrowed to what the evidence actually establishes.
The sand enquiry can then state the required distribution, cleanliness, preparation condition and system reference. It should not demand an undefined “cooling grade” without a validated link to the proposed installation.
For UAE projects, the silica sand page helps describe the material requirement. Evidence from recognised research can guide the trial, while local paired measurements answer the venue’s actual question.
A credible thermal proposition names its boundaries through precise test conditions. That allows an operator to assess material, complete system and water management together, rather than confuse a useful sand component with a guaranteed cooling technology.
13. Define whether the comparison concerns peaks or the session
A fictional reference record of 50°C, 60°C and 50°C has a peak of 60°C. A candidate record of 52°C, 55°C and 52°C has a lower peak but higher temperatures at the first and last observations. “Lower peak” is supported by these numbers; “cooler at every time” is not.
If a session summary is required, define how observations are weighted over time. Unequal observation intervals cannot be treated as equal durations without stating that assumption. Retain the measured sequence so the summary can be checked.
Choose the metric that answers the operational question before comparing alternatives. This avoids selecting a peak, mean or immediate post-watering value simply because it gives the most favourable commercial result.
14. Check whether the tested layer matches the proposed delivery
The accepted trial should identify the applied mass per area and the delivered sand condition. In a fictional 100 m² area receiving 1,500 kg, the applied quantity is 15 kg/m². A later trial at another quantity evaluates a changed condition, even if the sand comes from the same lot.
Keep layer condition, grading and other components attached to the thermal record. If later maintenance redistributes or changes the infill, inspect whether the installation still represents the evaluated condition before reusing the original claim.
15. Build an evidence-reading sheet
For each proposed result, record the measured quantity and unit, reference material, complete configuration, water conditions, observation duration and weather. Add the result’s origin: manufacturer test, university research or venue observation. These origins do not replace protocol review, but keep different kinds of evidence identifiable.
Then compare the studied configuration with the one offered for the pitch. Name any difference in fibre, underlying layer or irrigation arrangement. The supplier can explain its relevance and propose the additional comparison needed to resolve the question. An absent component does not become equivalent merely because the offered product has a similar name to the one in the report.
Retain unfavourable observations too. If the candidate is cooler only after watering and later reaches the reference, the sheet should describe that sequence. A clear account lets the operator judge whether the benefit fits the schedule, resources and feasible maintenance.
The purchasing conclusion can then be straightforward: retain the current system, test a candidate under the identified conditions or accept a change after the required checks. The sheet does not decide for the operator; it makes the connection between thermal evidence and material choice visible.