M0 denotes the sample indicates the crushing indicator with the coarse coral aggregates; ; m0 denotes the exactly where mass, g; and m1 represents the sample mass soon after crushing and screening, g. The arithmetic mean worth from the sample mass right after was adopted as the test g. sample mass, g; and m1 represents 3 measured values crushing and screening, outcome. The arithmetic imply worth of three measured values was adopted as the test result.mMaterials 2021, 14,6 of2.two.two. Water Absorption The coral aggregates are efficient in water absorption and hence possess a strong influence on the AS-0141 Epigenetic Reader Domain flowability and workability of concrete. The saturated surface dry water absorption of coarse coral aggregates was tested in line with the GB/T 14685-2011 typical [37]. An proper quantity of aggregate was place into a container with water, and also the aggregate was totally soaked with water for 24 h. Then, the aggregate was wiped dry, dried to a continual weight at a temperature of (105 five C), and weighed. The water absorption of your samples might be calculated in line with Equation (2) (correct to 0.1 ): G0 – G1 Wm = one hundred (two) G1 where Wm indicates the water absorption of the coarse coral aggregate, ; G0 represents the sample mass within the saturated surface dry state, g; and G1 expresses the dried sample mass, g. The arithmetic imply value of three measured values was adopted as the test result. two.two.3. Slump The coral concrete slump test was performed according to GB/T 50080-2002 [38]. The well-mixed concrete was evenly filled into the slump cone layer by layer (three layers in total), after which tamped with a rod to ensure that the height of every single layer following tamping was 1/3 in the cone. It truly is worth noting that the concrete needs to be larger than the cone verge when placing the top layer. The excessive concrete should be removed with a float to smooth the concrete surface. For the duration of the test, the slump cone desires to become lifted vertically and steadily soon after 50 s, along with the distance amongst the edge of the cone and the leading of the slump concrete must be measured to indicate the slump with the concrete. two.2.4. Microhardness The hardness of the interface among the aggregate and cement stone is usually a direct reflection of the combination from the aggregate and cement stone. An HV-1000 semi-automatic microhardness testing technique (DNQX disodium salt Formula Shandong IPRE Testing Technology Co. Ltd., Shandong, China) was employed to test the hardness with the interface amongst the coral aggregate and cement stone before and right after modification. The load worth selected within the experiment was 50 g, and the load time was 15 s. The sample was collected in the interface involving the coral aggregate and cement stone within the sample concrete block just after 28 days of standard curing; it was then soaked in absolute ethanol for 1 day to prevent hydration. It was cut into a 40 mm 40 mm 10 mm sample and dried to a continuous weight; then, the leading and bottom surfaces had been polished. The make contact with surface among the aggregate and cement stone was set because the zero-point to measure the internal aggregate and the basal body in the cement stone each and every 20 (220 in length). The measurement of each and every test point was repeated 3 times as well as the imply value in the measured values was viewed as the microhardness worth with the test point. 2.2.5. Compressive Strength The compressive strength test was conducted with a microcomputer-controlled electrohydraulic servo universal testing machine as outlined by GB/T 50081-2002 [39]. A TYEH2000 microcomputer-controlled loading.
