A method for predicting the maturity of a concrete during the curing process is disclosed. The method comprises the following steps: predicting at least one future temperature within the concrete; performing at least one temperature measurement, preferably a real-time temperature measurement of the concrete; transmitting the at least one temperature measurement wirelessly from at least one temperature sensor to an external device; and determining the energy production within the concrete.

Disclosed is a sulfate corrosion-resistant concrete, a method for optimizing proportion and application thereof. The concrete is formed by mixing and stirring base stocks, aggregates, admixtures, external additives and water. The base stock of the concrete is 17.4-17.5 parts of Portland cement; the aggregates include 38.9 parts of basalt with aggregate size of 5-10 mm and 33.1-33.2 parts of basalt medium sand; the admixtures are 1.9-1.95 parts of silica fume or fly ash, and further including 0.23-0.24 part of polycarboxylate water reducer and 1.34-1.35 part of sulfate corrosion-resistant liquid preservative. Optimized proportion method: according to the corrosion characteristics of sulfate and corrosion environment parameters, determine the composition and proportion of basic samples and comparison samples, make and cure sample components, test the deep components of the samples, and obtain the optimal composition and proportion according to the test results.

To suitably determine a measurement cycle at which to measure cracks that occur in structures formed from concrete or the like. Resolution Means: A measurement cycle determination device (2) includes a related information acquisition unit (41) that acquires at least one of geographic information including items related to a geography of a site where a structure is located, weather information including items related to weather at the site, and structure information including items related to the structure; a crack information acquisition unit (42) that acquires crack information related to a crack that has occurred in the structure; a measurement cycle determination unit (44) that determines, on the basis of at least one of the geographic information, the weather information, the structure information, and the crack information, a measurement cycle at which to measure a width of the crack; and a measurement cycle output unit (46) that outputs a measurement cycle signal indicating measurement cycle information related to the determined measurement cycle.

A method of analyzing a composite plug includes creating a composite plug, where the composite plug includes a formation layer, a cement layer, and an interface region between them, and the cement extends into the formation sample in the interface region. The method further includes imaging the composite plug to gather a series of discrete images, where each discrete image in the series depicts a cross section of the composite plug and the discrete images are taken at set increments throughout a depth of the composite plug. The method further includes analyzing each discrete image in the series of discrete images to determine a porosity measurement of each discrete image, determine a first and second boundary of the interface region from the porosity measurement of each discrete image, and determine a depth of the interface region by a number of discrete images between the first boundary and the second boundary.

Hundreds of thousands of concrete bridges and hundreds of billions of tons of concrete require characterization with time for corrosion. Accordingly, protocols for rapid testing and improved field characterization systems that automatically triangulate electrical resistivity and half-cell corrosion potential measurements would be beneficial allowing discrete / periodic mapping of a structure to be performed as well as addressing testing for asphalt covered concrete. Further, it is the low frequency impedance of rebar in concrete that correlates to corrosion state but these are normally time consuming vulnerable to noise. Hence, it would be beneficial to provide a means of making low frequency electrical resistivity measurements rapidly. Further, prior art techniques for electrical rebar measurements require electrical connection be made to the rebar which increases measurement complexity/disruption / repair / cost even when no corrosion is identified. Beneficially a method of determining the state of a rebar without electrical contact is taught.

The present disclosure discloses a medium transmission test device and a method for concrete under a temperature-osmotic pressure-load coupling effect. The device includes a loading device and a water pressurization device; the loading device includes a press, an upper steel plate and a lower steel plate used for clamping a test block, and a fastener that connects the upper and lower steel plates; the upper steel plate includes a first steel plate and a second steel plate; a spring is sleeved on a screw between the first steel plate and the second steel plate; the water pressurization device includes a liquid storage tank, a pressurization pump, a liquid storage pool, a connecting pipe for communicating the pressurization pump to the liquid storage tank, and a connecting pipe for connecting the pressurization pump to the liquid storage pool; the liquid storage tank is provided with an open end; and a tank port of the open end is fixedly connected to a side surface of the test block. The present disclosure achieves a load-temperature-osmotic pressure coupling effect on concrete, can well simulate a complicated severe environment where underground concrete is located, and provides an effective device support for the study of the durability of concrete under complicated severe conditions.

The present invention relates to a quantitative evaluation method for concrete workability based on bottom resistance, including the following steps: step 1, carrying out a test for bottom resistance of fresh concrete; step 2, drawing a curve of inserting velocity of steel sheet over time; and step 3, quantitatively evaluating a concrete workability based on conditions of the bottom resistance. This method can quantitatively characterize the sinking condition of aggregate of the fresh concrete by effectively carrying out the test for bottom resistance of fresh concrete, calculating the inserting velocity of concrete and drawing the curves of displacement and velocity over time, so as to achieve the quantitative evaluation for concrete workability and overcome the defects of conventional methods that it is difficult to quantitatively characterize the segregation degree of concrete.

A method for identifying prestress force in single-span or multi-span PCI girder-bridges is provided. The method includes non-destructive steps for obtaining a set of parameters of the PCI girder-bridge under investigation, and combines various analyses to identify the change of prestress force. Therefore, the losses of prestress force are tracked and predicted. The method does not cause structural damages along the PCI girder-bridge, and the cost of the identification is significantly decreased.

The present invention relates to a quantitative evaluation method for concrete workability based on bottom resistance, including the following steps: step 1, carrying out a test for bottom resistance of fresh concrete; step 2, drawing a curve of inserting velocity of steel sheet over time; and step 3, quantitatively evaluating a concrete workability based on conditions of the bottom resistance. This method can quantitatively characterize the sinking condition of aggregate of the fresh concrete by effectively carrying out the test for bottom resistance of fresh concrete, calculating the inserting velocity of concrete and drawing the curves of displacement and velocity over time, so as to achieve the quantitative evaluation for concrete workability and overcome the defects of conventional methods that it is difficult to quantitatively characterize the segregation degree of concrete.

A tester for evaluating pullout load capacity and bond quality of anchor bolts embedded in concrete includes a Schmidt hammer for measuring a rebound number and an ultrasonic pulse velocity tester for measuring the transit time of a pulse transmitted through concrete surrounding an anchor bolt. The rebound number and the transit time are combined and matched against a database record which identifies the pullout load capacity and the bond quality. The transit time is matched to thresholds of transit times associated with porosity, internal cracking, air voids, and water pockets located around the embedded anchor bolt. The Schmidt hammer is further modified by the incorporation of a digital level for measuring the vertical and horizontal angles of inclination of the plunger with the concrete surface, a guide tube for supporting the plunger, and by using a convex plunger tip for improved registration with anchor bolt head.