Temperature measurement in the construction industry

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Temperature is an important parameter in the construction industry that needs to be measured and monitored during the concreting and asphalting process. The temperature of cement and asphalt is measured during the production, transport and installation process.
Cement / concrete temperature measurement
Concrete is formed by hydration of cement. Hydration of cement is an exothermic chemical reaction, ie. heat is released. One of the most important aspects of concrete cooling is the reduction of concrete heating during hydration before installation.

The hydration temperature (reaction of cement with water) raises the temperature of the concrete to 25 ° C during the process of maturation (hardening) of the concrete. Due to that, the concrete expands and does not achieve homogeneous strength in its entire volume. By hardening, the concrete cools and cracks due to contractions or volume reduction.

It is important that the pouring temperature of the cement is as low as possible in order to remain within satisfactory limits during the maturing process.

The main problem for the strength and maturation of concrete is not the air temperature, but the temperature at which the hydration process takes place.

Once the cement is hydrated, it rapidly begins to absorb large amounts of water, which further leads to the phenomenon of accelerated crystal formation around the aggregate particles (gravel, crushed stone, metal chips, etc.).

Crystal formation accelerates with increasing temperature. This accelerated reaction means that the crystals do not have enough time to strengthen, which later affects the strength of the concrete itself.

In these cases, the initial strength is high, but after 28 days (how long the concrete matures), the concrete formed in this way becomes weak.

 If fresh concrete is about 10 ° C warmer than normal (for example 30 ° C instead of 20 ° C), the final compressive strength will be about 10% lower.

Cement concrete should be installed as soon as possible after preparation, so as not to reduce the possibility of its installation, ie before the start of cement setting (not more than 1.5 hours).

The temperature of fresh cement concrete during installation must be at least 7 ° C (in exceptional cases 3 ° C) and at most 25 ° C (in exceptional cases 30 ° C). The temperature of the formwork or base for cement concrete must be between 3 ° C and 40 ° C.

Hanna Instruments has high-precision, easy-to-use thermometer solutions for measuring temperature in the construction industry.

Asphalt temperature measurement
Asphalt, viscous liquid or semi-liquid is naturally found along with numerous deposits of oil and other materials. Naturally occurring asphalt is sometimes referred to as “raw bitumen”. Its viscosity is similar to that of cold molasses, while the material obtained by fractional distillation of crude oil boiling at 525 ° C (977 ° F) is sometimes called “refined bitumen”. In materials science and engineering, the terms “asphalt” and “bitumen” are often used interchangeably, both to denote natural and manufactured forms of this substance, although there is regional variation as to which term is most common.
The properties of asphalt change with temperature, which means that there is a certain range where the viscosity allows adequate compaction by providing lubrication between the particles during the compaction process. The low temperature prevents the aggregate particles from moving, and the required density cannot be achieved.
Bituminous mixtures for asphalt layers must be produced by a hot process. The mixing temperature of the bituminous mixture depends on the type of binder used. The recommended and limit temperatures of bituminous mixtures in production are given in the table. In exceptional circumstances, the highest temperature of bituminous mixture may be up to 10 °C higher than specified.
Bitumen type Temperature of produced bituminous mixture (° C)
recommended the highest
B 160/220 140 ± 10 165
B 100/150 145 ± 10 170
B 70/100 150 ± 10 175
B 50/70 160 ± 10 180
B 35/50 170 ± 10 190

The bituminous mixture may only be installed under appropriate weather conditions. The recommended and lowest temperature of the bituminous mixture at the installation site are in relation to the type of binder used for production specified in the table:

Bitumen type Temperature of bituminous mixture during installation (° C)
recommended the lowest
B 160/220 135 110
B 100/150 140 115
B 70/100 145 120
B 50/70 155 130
B 35/50 165 140
The highest temperature of the bituminous mixture during installation may be up to 20°C higher than recommended, except in the case of the use of rubberized bitumen, when it may not exceed 10° C higher than recommended. When manually installing and compacting in windy and cold weather, the lowest temperature of the bituminous mixture must be 10 °C higher than the required lower limit value for a certain type of binder.
Measure the temperature on your construction site in a simple, fast and accurate way using:


Checktemp®  Digital thermometer with stainless steel penetration probe
The Checktemp® delivers high accuracy temperature measurements over a  wide range without concern for breakage  or condensation. The Checktemp® offers no breakage, no waste, no injuries and no difficulty in reading; the digital display prevents a parallax error (observing the wrong measurement due to the angle of view) and is optimized for a wide range of environmental temperatures. Checktemp® is provided with Hanna’s unique CAL Check™ function for accurate measurements every time. The Checktemp® implements a CAL Check™ upon startup  and reports the status as “-0-” or “Err”. The sharp-tip probe of the Checktemp® easily penetrates semi-solid products making routine temperature checks simple and quick for both incoming and outgoing goods.
  • Large display
  • Selection of temperature units ° C or ° F
  • Waterproof housing IP65 degree of protection
  • Stainless steel probe AISI316
  • Measuring range : -50.0 to 150.0°C
  • Resolution: 0.1°C (-50.0 to 150.0°C)
  • Accuracy: ±0.2°C (-30 to 120°C) ±0.3°C (outside: -50.0 to -30.0°C and 120.0 to 150.0°C)
  • Probe: fixed, stainless steel, penetration
  • Battery / Battery life: CR2032 Li-ion / Approx. 2000 hours of continuous use
  • Auto off: 8 min (default), 60 min or OFF
  • Environment: -30 to 50 ° C (-22 to 122 ° F); IP65
  • Dimensions: 50 x 185 x 21 mm (2 x 7.3 x 0.9 ’’)
  • Weight: 50 g (1.8 oz.)


Type K thermometer
HI935003 is designed for the measurement of industrial and domestic applications as well as farm and field temperatures.

This thermometer is compatible with K-type thermocouple probes to provide the greatest accuracy and offers a large range of temperature measurement; from -50 to 300°C (-58.0 to 572°F).

Features include waterproof casing  (rated IP65), CAL Check, low battery detection, auto-off capability, and long battery life.
  •  Compatible with K-type thermocouple probes
  • CAL Check™ feature
  • Remaining battery life indication/low battery detection
  • Auto-off
  • IP65 waterproof housing
  • Range: -50.0 to 199.9 ° C / 200 to 300 ° C; -58.0 to 399.9 ° F / 400 to 572 ° F
  • Resolution: 0.1 ° C (-50.0 to 199.9 ° C) / 1 ° C (200 to 300 ° C); 0.1 ° F (-58.0 to 399.9 ° F) / 1 ° F (400 to 572 ° F)
  • Meter accuracy (@ 23.0 ° C ± 5 ° C): ± 0.4 ° C (-50.0 to 300 ° C) ± 0.7 ° F (-58.0 to 572 ° F)
  • Response time for 90% of the final value: 20 seconds
  • Battery type/ life: 1.5V AAA (3) / approximately 3500 hours of continuous use; user-selectable auto-off after 8 or 60 minutes of non-use (can be disabled)
  • Environment:
    Rated operating condition: -20 to 50 °C (-4 to 122 °F), limiting condition: -30 to 50°C (-22 to 122°F), storage and transportation condition: -40 to 70°C (-40 to 158°F), relative humidity 100%
  • Storage/transport temperature:  -40 to 70°C (-40 to 158°F)
  • Dimension: 140 x 57 x 28 mm (5.5 x 2.2 x 1.1’’)
  • Mass: 178 g (6.27 oz.)
With a type K thermometer, choose the penetration probe that best suits your needs!
HI766 thermocouple probe type K
HI766TR1, HI766TR2, HI766TR3, HI766TR4

Penetration probes for semi-solid samples

Our optional HI710027 blue shockproof rubber boot offers maximum impact protection.


Max temperature: 250°C (482°F)
Response time: 10 seconds
Probe dimensions: L 500 mm x dia 10 mm (19.7 x 0.39’’)
Probe material: stainless steel
Cable lenght: 1m/ (3.3’)


Max temperature: 250°C (482°F)
Response time: 14 seconds
Probe dimensions: L 1000 mm x dia 10 mm (19.7 x 0.39’’)
Probe material: stainless steel
Cable lenght: 1m/ (3.3’)


Max temperature: 250°C (482°F)
Response time: 10 seconds
Probe dimensions: L 1500 mm x dia 10 mm (19.7 x 0.39’’)
Probe material: stainless steel Cable lenght: 1m/ (3.3’)


Max temperature: 250°C (482°F)
Response time: 10 seconds
Probe dimensions: L 2000 mm x dia 10 mm (19.7 x 0.39’’)
Probe material: stainless steel
Cable length: 1m/ (3.3’)
If you need measurements at higher temperatures, choose Hanna:
K, J, T-Type Thermocouple Thermometers
These instruments offer the ability to take temperature measurements with different types of thermocouples and are equipped with a single button that switches between K-type, J-type or T-type thermocouples.
The HOLD button freezes the display to allow the user time to record readings. The CLR button restarts the evaluation of  high and low values.
These thermometers display the current temperature along with the high and low extremes achieved during measurement.
For high accuracy, the HI93551N features a CAL button to allow the operator a simple one-point calibration in an ice bath at 0°C when probe interchange occurs.
The instruments are equipped with BEPS (Battery Error Prevention System), which alerts the user in the event that low battery power could adversely affect readings.
  • Range: K -200.0 to 999.9°C and 1000 to 1371°C; -328.0 to 999.9°F and 1000 to 2500°F J -200.0 to 999.9°C; -328.0 to 999.9°F i 1000 to 1832°F J -200.0 to 999.9°C; -328.0 to 999.9°F and 1000 to 1832°F T -200.0 to 400.0°C; -328.0 to 752.0°F
  • Resolution: K– 0.1°C (-149.9 to 999.9°C); 0.2°C (-200.0 to -150.0°C); 1°C (1000 to 1371°C); 0.1°F (-24.9 to 999.9°F); 0.2°F (-249.9 to -25.0°F); 0.3°F (-328.0 to -250.0°F); 1°F (1000 to 2500°F) J– 1°C (-200.0 to 999.9°C); 0.1°F (-149.9 to 999.9°F); 0.2°F (-328.0 to -150.0°F); 1°F (1000 to 1832°F) T– 0.1°C (-149.9 to 400.0°C); 0.2°C (-200.0 to -150.0°C); 0.1°F (0.0 to 752.0°F); 0.2°F(-270.0 to -0.1°F); 0.3°F (-328.0 to -270.1°F)
  • Accuracy: ±0.5°C (-100.0 to 999.9°C); ±1°C (outside); ±1°F (-148.0 to 999.9°F); ±1.5°F (outside) (for 1 year, excluding probe error)
  • Probe: HI766 series K-type thermocouple (not included)*
  • Battery Type / Life: 5V AA (3) / approximately 500 hours of continuous use (with backlight off); auto-off after 60 minutes of non-use (can be disabled); auto-off after 8 minutes (HI93551R)
  • Environment: 10 to 60°C (14 to 122°F); RH max 100%
  • Dimensions / Weight: 150 x 80 x 36 mm (5.9 x 3.1 x 1.4’’) / 235 g (8.3 oz.)


Penetration, stainless steel K-type thermocouple temperature probe with 1 m cable


Air/gas, stainless steel K-type thermocouple temperature probe with 1 m (3.3’) cable


General purpose/penetration, stainless steel K-type thermocouple temperature probe with 1 m (3.3’) cable
with dew point and calibration
data-logging probe

HI9564 and HI9565 are portable thermo-hygrometers designed to measure temperature and Relative Humidity (RH). HI9565 presents the added advantage of being able to calculate the dew point from the temperature and RH.
To ensure maximum protection against the effects of humidity and condensation, the instruments are housed in a rugged, water-resistant casing.

The temperature and RH probe is a “smart probe” which consists of a factory calibrated electronic sensor which requires no user calibration. Our “smart probes” will work with any of our meters without the need to recalibrate as the electronic sensor tracks the performance and stores the calibration history directly onto the probe.

Simultaneous RH and temperature measurements on a large, dual-line LCD display, selectable temperature unit (°C or °F).

HI706023 dedicated temperature and RH probe with electronic sensor, quick connect probe, battery life indication and low battery detection, stability indicator, auto-off function, waterproof casing IP67, MIN, MAX value and HOLD indicator, stability indicator.

Range: 0.0 to 100.0 % RH
Resolution: 0,1 % RH
Accuracy: ±2.5 % RH (0 to 90 % RH); ±3.5 % RH (90 to 100 % RH);

Range: -10.0 to 60.0°C / 14.0 to 140.0°F
Resolution: 0.1°C / 0.1°F
Accuracy: ±0.4 °C / ±0.8 °F

Probe : HI706023 RH/temperature probe
Battery Type / Life: 1.5V AAA / 10,000 hours of continuous use
Auto-off: User selectable: after 8 minutes, 60 minutes or disabled
Environment: 0 to 60 °C (32 to 140 °F); 98 % RH non-condensing
Dimension: 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
Weight: 196 g (6.91 oz.)

Dewpoint temperature (HI9565 only):
Range: -20.0 to 60.0°C / -4.0 to 140.0°F
Resolution: 0.1°C / 0.1°F
Accuracy: ±2°C /±4°F (50 to 85 % RH and 15 to 40°C); ±4.5 °C /±9 °F (outside)

Shockproof orange silicon rubber boot








Bojana Tomić – Burtić
graduate chemist of general chemistry


– Naik, T.R. 1985. Temperature Effects on Concrete, pp. 88–106. Philadelphia: ASTM International.
– Technical conditions for road construction in the Republic of Serbia – PE Roads of Serbia