The experiment for brick samples adopted the aggregates and powders composition of6 to 4. The critical granularity is 3mm and the composition includes 3 classes, as follows3～2mm 30%, 2～0.9mm 15%, 0.9～0.088mm 15%.
Furthermore, the recycled concrete aggregate can also be used to mix self-compact high performance concrete, the slump and the slump spread of fresh concrete were over 245 mm and 560 mm respectively, the compressive strength at 28 days and 60 days were over 58.0 MPa and 67.3 MPa respectively, when the water/cement ratio was 0.40 and water content about 205kg/m3.
The research base on the lab experiment and the main results are summarized as follows:1. The concrete aggregate samples which are collected on the spot are examined by GB/T14684-2001 Quick Alkali-silica Reaction , GB/T 14684-2001 Alkali-silica Reaction and Petrographic Experimental Method respectively.
Tests were conducted on prisms of 25 cm×25 cm×50 cm fabricated with dam concrete(maximum aggregate of 80 mm),and standard 15 cm×15 cm×30 cm prisms,10 cm×10 cm×20 cm prisms which were made with the wet-screened components of dam concrete.
The soil structure was expressed with fractal dimensions of particle size distribution (PSD), aggregate size distribution (ASD), and soil pore size distribution (SPD).
Results showed that the fractal dimension of particle size distribution (PSD), the micro-aggregate size distribution (ASD) and the soil pore size distribution (SPD) can be used as the indices to evaluate the soil structure.
This paper describes a preliminary study on the synthesis of glycopeptide-based triblock copolymers and their aggregate behavior in water.
These curves were compared with the ones from flat aggregate surface on which mono-size spherical particles were packed.
The shape of the curve of solid volume fraction versus the distance from the surface of the fiber is similar to that around a flat aggregate surface.
Crystallization behavior of single or pauci chain aggregates of isotactic polystyrene
Single and pauci chain aggregates of isotactic polystyrene (i-PS) were prepared by the freeze-drying process from dilute solutions with the concentration from 1×10-3 to 2×10-5 g/mL.
The content of water stable aggregates in 18-year-old shrub land soil is higher than the 8-year-old shrub land, and the big aggregates (>amp;gt;5 mm) increased for the most part, by 67.4% and 59.0% in different layers, respectively.
The contents of aggregates of over 0.25 mm in two shrub land soils in the upper layer (0-20 cm) increased by 4.6% and 14.1% compared with farmland.
korshinski afforestation can increase the content of aggregates.
We analyze images of concrete aggregate material and design computational measures for angularity, surface texture, and the shape of the particles.
A microgranite, showing varying degrees of weathering with depth, has been investigated as a source of concrete aggregate for dam construction.
The pavement contractor obtained some 250,000 tonnes of concrete aggregate by quarrying basalt from aa lava flows associated with highly vesicular basalt scoria ejected during Strombolian-type eruptions.
In this study the engineering properties of Sandikli zeolithic tuffs and their possible use as concrete aggregate have been investigated.
Use of recycled concrete aggregate in high-strength concrete
An organizational system is considered, namely, an aggregate of certain elements that are hierarchically connected for fulfilling a collection of functions.
This approach relies on the algebra of tuples, with the aid of which a system with many states is represented in the form of an aggregate of multiple relations, so that the system proves to be isomorphic to the algebra of sets.
The complicated process of pollutant spread was modeled as an aggregate of four simpler models such as overland water flow, influent seepage, pollutants transport with surface runoff, and pollutant deposition (accumulation) on the land surface.
In this fraction in the presence of GSH there is an aggregate of reactions taking place both in membranes (lipid peroxidation) and outside membranes (MDA conversion to methylglyoxal and further to neutral D-lactate).
The model of spherical molecular aggregate of nonionic surfactant is proposed.