FOHG FRQFUHWH - Institute of Physics
The polycarboxylate-based superplasticizer with water reduction rate of 33.8% was used. Table 1. Chemical compositions of cement and fly ash. Raw Materials Chemical compositions (%) CaO SiO2 Al2O3 Fe2O3 MgO L.O.I SO3 Cement 65.52 22.45 4.49 4.13 1.47 1.00 0.94 Fly ash 3.23 54.26 26.37 12.56 0.74 0.86 0.49 Table 2.
Progresses in Synthesis of Polycarboxylate Superplasticizer - Hindawi
The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well as enhancement in
HV6128 - Institute of Physics
concrete raw materials during the application process, especially in low temperature construction in winter, the phenomenon of lagging bleeding in concrete with polycarboxylate superplasticizer is very common, this puts higher requirements on the performance of polycarboxylate superplasticizer[5-6].
Preparing controlled low strength materials (CLSM) using
This paper examines the feasibility of preparing controlled low strength material (CLSM) using excavated waste soils, where polycarboxylate superplasticizer (PCE) is used to improve workability of the materials. The engineering properties of soil-based CLSM are experimentally investigated.
Materials | Free Full-Text | A Comprehensive Study on the Hardening
A new type of polycarboxylate superplasticizer (PCE, with solid content of 14.68%) modified with VMA (0.2 wt.% of PCE) was used in the mixtures. A naphthalene-based superplasticizer (NS, with solid content of 37.00%) was used as reference. Crushed basalt rock coarse aggregates with continuum grain sizes ranging from 5 mm to 31.5 mm were applied.
- What are viscosity reducing polycarboxylate superplasticizers (Jn-PCE)?
- In this study, we synthesized a series of viscosity-reducing polycarboxylate superplasticizers (JN-PCE) utilizing allyl polyethylene glycol ether (APEG), acrylic acid (AA), and sodium methallyl sulfonate (SMAS) as raw materials through the process of free radical polymerization.
- Are polycarboxylate-based superplasticizers effective?
- Their effectiveness is determined by their interactions between the individual constituents, which include a variety of fine powders. In this research, different investigative methods were employed to study the influence of polycarboxylate-based superplasticizers (PCs) on the performance of UHPC.
- Which polyglycols are used in synthesis of PCE -superplasticizers?
- Clariant is one of the world's leading suppliers of polyglycols used in the synthesis of PCE -superplasticizers (3rd generation superplasticizers). Our Polyglykol M-types meet all requirements for esterification e.g. with methacrylic acid, acrylic acid and pre-polymerized (meth-)acrylates.
- What is silane-modified polycarboxylate superplasticizer (s/AA-hpeg)?
- 2.2. Synthesis of the silane-modified polycarboxylate superplasticizer The silane-modified polycarboxylate superplasticizer (S/AA-HPEG) was synthesized through radical copolymerization with methacryloyloxypropyltrimethoxysilane (S), isobutylene polyvinyl ether (HPEG) and acrylic acid (AA).
- Why is silane grafted to polycarboxylate superplasticizer?
- Silane was grafted to the superplasticizer to make it have reaction potential with hydrates. According to the literatures [14, 15], the introduction of silane to polycarboxylate superplasticizer can improve its adsorption capacity to the surface of cement, so as to improve its water reduction performance.
- Does silane increase carboxyl groups in polycarboxylate superplasticizers?
- Discussion According to the results presented above, the adequate incorporation of silane in polycarboxylate superplasticizers not only increased the amount of carboxyl groups, but also provided potentially reactive sites in the polymer.
