Tartaric acid derivatives calcium salts

Bagi P, Kdllay M, Hessz D, Kubinyic M, Holczbauer T, Czugler M, Fogassy E, Keglevich G (2014) Resolution of l-n-propoxy-3-methyl-3-phospholene 1-oxide by diastereomeric complex formation using TADDOL derivatives and calcium salts of O, 0 -dibenzoyl-(2R,3R)-or O, 0 -di-P-toluoyl-(2R,3R)-tartaric acid. Tetrahedron Asymmetry 25 318-326... 

In order to accelerate or retard the setting of cement, water-soluble admixtures may be used (see Section 5.3.1). Whilst many inorganic salts, such as calcium chloride, can act as accelerators, lead and zinc salts, borates and phosphates, as well as hydrocarbonic acids (e.g., citric acid or tartaric acid) and, most importantly, sugar derivatives such as raffinose or sucrose, will tend to retard the setting process. As the rate of setting can be determined by recording the heat evolved during hydration, a plot of (in Wkg ) versus 1/t will yield a close to linear relationship. 

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